Demetra McIlwain, MD
Family Medicine Physician · Buffalo, NY
Demetra McIlwain, MD is a family medicine physician with a practice address in Buffalo, New York, and NPI 1871056002, issued on Apr 14, 2019. Check the license (New York 319236, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Demetra McIlwain
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 319236 NY
Self-reported in NPPES; status is on the state search - Practice location
- 21 Doat St, Buffalo, NY 14211
- Phone
- (716) 892-2775
- Enumerated
- Apr 14, 2019
- Record last updated
- Dec 16, 2022
- Fax
- (716) 597-0554
- Medicare enrollment
- Enrolled (PECOS I20221116002362); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 6,417 in New York → Look up another NPI →
Also registered at 21 Doat St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Natalie Asbach, PA-CPhysician Assistant1558778290
- Brent Maczuga, PA-CPhysician Assistant1891112496
- Shairi SmithDoula1285508903
Verify Demetra McIlwain in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 319236Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% fewer Medicare Part D claims than the average family medicine physician in 2024
1,269 Medicare Part D claims for 136 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims. 18 claims were for opioids.
Most prescribed
- Atorvastatin Calcium103 claims
- Metformin Hcl60 claims
- Ozempic51 claims
- Amlodipine Besylate50 claims
- Gabapentin40 claims
- Trulicity35 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Erie County Medical Center CorporationBuffalo, NY
- Jericho Road Ministries, Inc.Buffalo, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Demetra McIlwain among 6,417 family medicine physician records in New York
Demetra McIlwain, MD is one of 6,417 family medicine physician records with a practice address in New York. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 83% of them.
- NPI issued2019 · 83% of these records are older, 14% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2018 · median 2007 among the 4,188 with a school on file
- Record last updated2022 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in New York
There are 6,417 family medicine physician records in New York.
All 6,417 in New York → Every provider in Buffalo → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Ashley Deluca, DOBuffalo, NY 142121720607211
- Kayla Garcia, M.D.Buffalo, NY 142121316358609
- Carla Henke, MDBuffalo, NY 142121508023037
- Hassan Nagy, MD, MBABuffalo, NY 142101932847142
- Kyle Osborn, M.D.Buffalo, NY 142101417942582
- Emmanuel Packianathan, MDBuffalo, NY 142101932147410
- Aung Thant, M.D.Buffalo, NY 142121730522541
- Colleen Weseloh, M.D.Buffalo, NY 142121962820100
Common questions
What is Demetra McIlwain, MD's NPI number?
Demetra McIlwain, MD's National Provider Identifier (NPI) is 1871056002, issued on Apr 14, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Demetra McIlwain, MD located?
The NPPES record lists a practice address at 21 Doat St, Buffalo, NY, 14211. Phone: (716) 892-2775. Providers update this record themselves, so call before visiting.
How can I verify Demetra McIlwain, MD's license?
NPPES lists New York license number 319236, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Demetra McIlwain, MD prescribe under Medicare Part D?
In 2024, Demetra McIlwain, MD had 1,269 Medicare Part D claims for 136 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.