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DR. DEMETRA MCILWAIN MD
NPI 1871056002
Family Medicine in Buffalo, NY

Active since April 14, 2019PECOS EnrolledAccepts Medicare Assignment
21 DOAT ST, BUFFALO, NY 14211(716) 892-2775(716) 597-0554 Get Directions Write a Review

NPPES record last updated: December 16, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 16, 2022, Aug 25, 2022, Apr 14, 2019 (3 updates tracked since 2019).

About Dr. Demetra Mcilwain Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. DEMETRA MCILWAIN MD (NPI 1871056002) is an individual family medicine provider in Buffalo, New York, licensed in New York (319236) and active in the NPI registry since April 2019. She is enrolled in Medicare PECOS, is affiliated with Erie County Medical Center, and is a graduate of Other (2018).

NPPES Registry Identity

NPI1871056002
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameDR. DEMETRA MCILWAINCredential: MD
Location Address21 DOAT STBuffalo, NY 14211-1612
Mailing Address21 Doat StBuffalo, NY 14211-1612 · (716) 892-2775 · Fax (716) 597-0554
Phone(716) 892-2775
Fax(716) 597-0554
Sole ProprietorNo
Medical School CMSOtherGraduated 2018
Enumeration DateApril 14, 2019
Last NPPES UpdateDecember 16, 20223 updates tracked since enumeration
NPPES CertifiedDecember 16, 2022
✔ NPI 1871056002 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in NY · 319236
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
21 DOAT ST, Buffalo, NY 14211
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Demetra Mcilwain Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6406183755
PECOS Enrollment IDI20221116002362
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

3

Medicare enrollment records show Demetra Mcilwain reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Jericho Road Ministries, Inc.
Same address
Federally Qualified Health Center (FQHC)
21 DOAT STREET
Buffalo, NY 14211
  • Reassigned Medicare billing, New York enrollment
  • 40 clinicians in this Medicare group
NPI 1619307022 (716) 892-2775
Erie County Medical Center Corporation
1.4 mi
Clinic/Center
462 GRIDER ST
Buffalo, NY 14215
  • Reassigned Medicare billing, New York enrollment
  • 302 clinicians in this Medicare group
NPI 1528233616 (716) 898-3000
Ub Family Medicine, Inc
7.6 mi
Family Medicine
850 HOPKINS RD
Williamsville, NY 14221
  • Reassigned Medicare billing, New York enrollment
  • 63 clinicians in this Medicare group
NPI 1942294467 (716) 688-9641

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Erie County Medical Center

Acute Care Hospitals · Buffalo, NY
2/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number330219
Location462 Grider StreetBuffalo, NY 14215 · Erie County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 14211 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$84.93 typical visit price
range $54.87 – $166.88
Typical copayment $21.23 (range $13.71 – $41.72)
Most-billed visit code 99203
Established Patient
$97.08 typical visit price
range $17.54 – $136.14
Typical copayment $24.27 (range $4.38 – $34.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 3

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SHAIRI SMITH
Doula
21 DOAT ST
BUFFALO, NY 14211
Erie County (716) 339-9210
MRS. NATALIE ASBACH PA-C
Physician Assistant
21 DOAT ST
BUFFALO, NY 14211
Erie County (716) 881-6191
BRENT P MACZUGA PA-C
Physician Assistant
21 DOAT ST
BUFFALO, NY 14211
Erie County (716) 892-2775

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Demetra Mcilwain's NPI number?

The NPI number for Demetra Mcilwain is 1871056002. It was assigned to this individual provider in the NPPES registry on April 14, 2019.

Where is Demetra Mcilwain located?

Demetra Mcilwain practices at 21 Doat St, Buffalo, NY 14211. The listed phone number is (716) 892-2775.

What is Demetra Mcilwain's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Demetra Mcilwain enrolled in Medicare?

Yes. Demetra Mcilwain is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Demetra Mcilwain's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Demetra Mcilwain reassigns Medicare benefits to 3 organizations: Jericho Road Ministries, Inc. (Buffalo, NY), Erie County Medical Center Corporation (Buffalo, NY) and Ub Family Medicine, Inc (Williamsville, NY). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Demetra Mcilwain's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Demetra Mcilwain affiliated with any hospitals?

According to CMS data, Demetra Mcilwain is affiliated with Erie County Medical Center.

When was this NPI record last updated?

The NPPES record for Demetra Mcilwain was last updated on December 16, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.