Gregory WarrenMD
Internal Medicine, Nephrology
2027 Medicare Advantage
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Medicare Advantage plans for Milwaukee County, WI.
Use the name or plan ID on your member card, or choose your insurance company.
Directory results See what each insurance company reports
Listed on 8 Medicare Advantage plans for 2027
Carrier directories and Medicare.gov provider data list Gregory on these plans. Review each plan's covered offices before enrolling. One directory didn't answer this time; we'll try it again.
The 50 Medicare Advantage plans we show for Milwaukee County, WI in 2027
- 8 list Gregory
- 41 not listed
- 1 not checked yet
Aetna Medicare
6 plans list Gregory.
Aetna Medicare Eagle (PPO)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 2900 W Oklahoma Ave, Milwaukee, WI, 53215
- 3120 S 27th St, Uppr, Milwaukee, WI, 53215
- 2025 E Newport Ave, Milwaukee, WI, 53211
- 12500 W Bluemound Rd, Elm Grove, WI, 53122
- 3289 N Mayfair Rd, Wauwatosa, WI, 53222
This result applies to these offices. Other locations are not confirmed.
$0a monthAetna Medicare Signature (HMO-POS)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 2900 W Oklahoma Ave, Milwaukee, WI, 53215
- 3120 S 27th St, Uppr, Milwaukee, WI, 53215
- 2025 E Newport Ave, Milwaukee, WI, 53211
This result applies to these offices. Other locations are not confirmed.
$0a monthAetna Medicare Signature (PPO)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 2900 W Oklahoma Ave, Milwaukee, WI, 53215
- 3120 S 27th St, Uppr, Milwaukee, WI, 53215
- 2025 E Newport Ave, Milwaukee, WI, 53211
- 12500 W Bluemound Rd, Elm Grove, WI, 53122
- 3289 N Mayfair Rd, Wauwatosa, WI, 53222
This result applies to these offices. Other locations are not confirmed.
$0a monthAetna Medicare Signature Extra (PPO)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 2900 W Oklahoma Ave, Milwaukee, WI, 53215
- 3120 S 27th St, Uppr, Milwaukee, WI, 53215
- 2025 E Newport Ave, Milwaukee, WI, 53211
- 12500 W Bluemound Rd, Elm Grove, WI, 53122
- 3289 N Mayfair Rd, Wauwatosa, WI, 53222
This result applies to these offices. Other locations are not confirmed.
$0a month
Molina Healthcare of Wisconsin
2 plans list Gregory.
Molina My Choice Dual Advantage (HMO D-SNP)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 3120 S 27th St, Uppr, Milwaukee, WI, 53215
- 6901 W Edgerton Ave, Greenfield, WI, 53220
- 7793 W Appleton Ave, Milwaukee, WI, 53222
This result applies to these offices. Other locations are not confirmed.
$0a monthMolina My Choice Partnership (HMO D-SNP)
Source: Medicare.gov provider data.
Listed offices for this plan:
- 3120 S 27th St, Uppr, Milwaukee, WI, 53215
- 6901 W Edgerton Ave, Greenfield, WI, 53220
- 7793 W Appleton Ave, Milwaukee, WI, 53222
This result applies to these offices. Other locations are not confirmed.
$0a month
Anthem Blue Cross and Blue Shield
Not listed on its 5 plans here. That isn't proof they're out of network.
Humana
Not listed on its 16 plans here. That isn't proof they're out of network.
iCare
Not listed on its 1 plan here. That isn't proof they're out of network.
Network Health Medicare Advantage Plans
Medicare.gov doesn't have provider data for these plans yet. We'll check again.
1 more Network Health Medicare Advantage Plans plan hasn't been checked yet.
UnitedHealthcare
Not listed on its 12 plans here. That isn't proof they're out of network.
Wellcare
Not listed on its 3 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 Gregory 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
- Dec 9, 2021
Medicare's clinician details aren't available on this page yet.
Questions
Common questions
Which 2027 Medicare Advantage plans list Gregory Warren?
In Milwaukee County, WI, 8 Medicare Advantage plans for 2027 list Gregory in provider data from Medicare.gov or the carrier, including Aetna Medicare Eagle (PPO), Aetna Medicare Signature (HMO-POS) and Aetna Medicare Signature (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 Gregory Warren take Aetna Medicare Medicare Advantage plans?
Medicare.gov provider data lists Gregory on 6 Medicare Advantage plans for 2027 in Milwaukee County, WI, including Aetna Medicare Eagle (PPO) and Aetna Medicare Signature (HMO-POS). 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 Gregory Warren take Molina Healthcare of Wisconsin Medicare Advantage plans?
Medicare.gov provider data lists Gregory on 2 Medicare Advantage plans for 2027 in Milwaukee County, WI, including Molina My Choice Dual Advantage (HMO D-SNP) and Molina My Choice Partnership (HMO D-SNP). CMS matches apply to the covered offices shown with each plan; other offices are not confirmed. Confirm with the office or Molina Healthcare of Wisconsin before you enroll.
Does Gregory Warren take Anthem Blue Cross and Blue Shield Medicare Advantage plans?
The provider searches didn't return a listing for Gregory on these 5 plans for 2027 in Milwaukee County, WI. Directories can lag, and a clinician can be in network at another office, so that isn't proof Gregory is out of network. Ask the office or a Silverpath advisor to confirm.
Where does Gregory Warren practice?
3120 South 27th Street, Milwaukee, WI 53215.
How do I confirm Gregory is in my plan's network?
Call the member services number on your plan card and give them the NPI 1649262544, 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 Gregory Warren on 37 plans from Anthem Blue Cross and Blue Shield, Humana, iCare, UnitedHealthcare and Wellcare in Milwaukee County, WI. 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.