William KnappDO
Family Medicine, Geriatric Medicine
2027 Medicare Advantage
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Medicare Advantage plans for St. Louis County, MO.
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Directory results See what each insurance company reports
Listed on 27 Medicare Advantage plans for 2027
Carrier directories and Medicare.gov provider data list William on these plans. Review each plan's covered offices before enrolling. One directory didn't answer this time; we'll try it again.
The 72 Medicare Advantage plans we show for St. Louis County, MO in 2027
- 27 list William
- 27 not listed
- 18 not checked yet
Aetna Medicare
13 plans list William.
Aetna Medicare Eagle (HMO-POS)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 2137 Charbonier Rd, Ste B, Florissant, MO, 63031
- 4800 Mexico Rd, Ste 102, Saint Peters, MO, 63376
This result applies to these offices. Other locations are not confirmed.
$0a monthAetna Medicare Elite (PPO)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 2137 Charbonier Rd, Ste B, Florissant, MO, 63031
- 4800 Mexico Rd, Ste 102, Saint Peters, MO, 63376
This result applies to these offices. Other locations are not confirmed.
$0a monthAetna Medicare Elite Classic (PPO)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 2137 Charbonier Rd, Ste B, Florissant, MO, 63031
- 4800 Mexico Rd, Ste 102, Saint Peters, MO, 63376
This result applies to these offices. Other locations are not confirmed.
$0a monthAetna Medicare Elite Classic Extra (PPO)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 2137 Charbonier Rd, Ste B, Florissant, MO, 63031
- 4800 Mexico Rd, Ste 102, Saint Peters, MO, 63376
This result applies to these offices. Other locations are not confirmed.
$0a month
UnitedHealthcare
10 plans list William; not listed on 1 other plan.
AARP Medicare Advantage CareFlex from UHC ST-6 (HMO-POS)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 2137 Charbonier Rd, Ste B, Florissant, MO, 63031
- 4800 Mexico Rd, Ste 102, Saint Peters, MO, 63376
This result applies to these offices. Other locations are not confirmed.
$0a monthAARP Medicare Advantage Essentials from UHC ST-3 (HMO-POS)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 2137 Charbonier Rd, Ste B, Florissant, MO, 63031
- 4800 Mexico Rd, Ste 102, Saint Peters, MO, 63376
This result applies to these offices. Other locations are not confirmed.
$0a monthAARP Medicare Advantage Patriot No Rx MO-MA01 (HMO-POS)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 2137 Charbonier Rd, Ste B, Florissant, MO, 63031
- 4800 Mexico Rd, Ste 102, Saint Peters, MO, 63376
This result applies to these offices. Other locations are not confirmed.
$0a monthAARP Medicare Advantage Extras from UHC ST-4 (HMO-POS)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 2137 Charbonier Rd, Ste B, Florissant, MO, 63031
- 4800 Mexico Rd, Ste 102, Saint Peters, MO, 63376
This result applies to these offices. Other locations are not confirmed.
$19a month
Anthem Blue Cross and Blue Shield · Anthem HealthKeepers
4 plans list William; not listed on 1 other plan.
Anthem Medicare Advantage (HMO-POS)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 2137 Charbonier Rd, Florissant, MO, 63031
- 4800 Mexico Rd, Saint Peters, MO, 63376
This result applies to these offices. Other locations are not confirmed.
$0a monthAnthem Veteran (PPO)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 2137 Charbonier Rd, Florissant, MO, 63031
- 4800 Mexico Rd, Saint Peters, MO, 63376
This result applies to these offices. Other locations are not confirmed.
$0a monthAnthem Full Dual Advantage (HMO D-SNP)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 2137 Charbonier Rd, Florissant, MO, 63031
- 4800 Mexico Rd, Saint Peters, MO, 63376
This result applies to these offices. Other locations are not confirmed.
$0a monthAnthem Full Dual Advantage 2 (HMO D-SNP)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 2137 Charbonier Rd, Florissant, MO, 63031
- 4800 Mexico Rd, Saint Peters, MO, 63376
This result applies to these offices. Other locations are not confirmed.
$0a month
Devoted
Not listed on its 9 plans here. That isn't proof they're out of network.
Essence Healthcare
Not listed on its 5 plans here. That isn't proof they're out of network.
HealthSpring
Not listed on its 5 plans here. That isn't proof they're out of network.
Humana
This directory didn't answer. We'll try again shortly.
Wellcare
Not listed on its 6 plans here. That isn't proof they're out of network.
Premiums are each plan's own monthly premium, as filed with Medicare. You keep paying your Medicare Part B premium.
Can't find your plan?Tell us the plan you have, and a licensed Silverpath advisor will check whether William takes it. Free.
Original Medicare
Original Medicare status
Most Medicare Supplement (Medigap) policies have no provider network: they help pay Original Medicare's cost sharing where Medicare is accepted. Medicare SELECT policies can require network providers for full benefits. Ask the office whether they accept Medicare.
Medicare enrollment and assignment have not been verified here. Advantage directory results do not answer this question.
No opt-out record in this CMS file. CMS's file covers data through 2026-08-31. This does not establish Medicare enrollment, assignment, or whether the office accepts new Medicare patients.
CMS opt-out source · Data through 2026-08-31 · Reviewed Oct 25, 2026
Where they practice
Practice location
- NPI issued
- 2005
- Registry record updated
- Feb 8, 2019
Medicare's clinician details aren't available on this page yet.
Questions
Common questions
Which 2027 Medicare Advantage plans list William Knapp?
In St. Louis County, MO, 27 Medicare Advantage plans for 2027 list William in provider data from Medicare.gov or the carrier, including Aetna Medicare Eagle (HMO-POS), Aetna Medicare Elite (PPO) and Aetna Medicare Elite Classic (PPO). CMS matches apply to the covered offices shown with each plan; other offices are not confirmed. Networks can change during the year, so confirm with the office or the plan before you enroll.
Does William Knapp take Aetna Medicare Medicare Advantage plans?
Medicare.gov provider data lists William on 13 Medicare Advantage plans for 2027 in St. Louis County, MO, including Aetna Medicare Eagle (HMO-POS) and Aetna Medicare Elite (PPO). CMS matches apply to the covered offices shown with each plan; other offices are not confirmed. Confirm with the office or Aetna Medicare before you enroll.
Does William Knapp take UnitedHealthcare Medicare Advantage plans?
Medicare.gov provider data lists William on 10 Medicare Advantage plans for 2027 in St. Louis County, MO, including AARP Medicare Advantage CareFlex from UHC ST-6 (HMO-POS) and AARP Medicare Advantage Essentials from UHC ST-3 (HMO-POS). 1 other plan did not return a listing in the search area. CMS matches apply to the covered offices shown with each plan; other offices are not confirmed. Confirm with the office or UnitedHealthcare before you enroll.
Does William Knapp take Anthem Blue Cross and Blue Shield Medicare Advantage plans?
Medicare.gov provider data lists William on 4 Medicare Advantage plans for 2027 in St. Louis County, MO, including Anthem Medicare Advantage (HMO-POS) and Anthem Veteran (PPO). 1 other plan did not return a listing in the search area. CMS matches apply to the covered offices shown with each plan; other offices are not confirmed. Confirm with the office or Anthem Blue Cross and Blue Shield before you enroll.
Where does William Knapp practice?
2137 Charbonier Rd Ste B, Florissant, MO 63031.
How do I confirm William is in my plan's network?
Call the member services number on your plan card and give them the NPI 1023099140, or ask a Silverpath advisor to check for you. It's free.
For providers
Is this your practice?
What patients see here today:
- Provider searches did not return a listing for William Knapp on 25 plans from Devoted, Essence Healthcare, HealthSpring and Wellcare in St. Louis County, MO. Other offices are not confirmed; this isn't proof the practice is out of network.
Tell us which plans you take, or want to take, and we'll keep this page accurate and talk with you about reaching more Medicare patients and carriers.