Mary Brennan, M.D.
NPI 1952468670 · Family Medicine Physician · Crownsville, MD
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Brennan, M.D. is a Family Medicine Physician provider in Crownsville, MD (NPI 1952468670).
Provider details
- NPI number
- 1952468670
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 94-199 (NM)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,146 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 716 | $80 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 213 | $139 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 77 | $109 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 47 | $169 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 36 | $122 |
| Initial Nursing Facility Care With High Level of Medical Decision Making, Per Day, If Using Time, 50 Minutes Or More99306 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 27 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 49 | — |
| Lisinopril | 38 | — |
| Amlodipine Besylate | 34 | 12 |
| Atorvastatin Calcium | 28 | 12 |
| Metoprolol Succinate | 25 | — |
| Thyroid,porkbrand: Armour Thyroid | 24 | — |
| Carvedilol | 23 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$21 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (3)
- 4701 Montgomery Blvd NeAlbuquerque, NM 87109-1219Phone: (505) 727-8360Fax: (505) 727-8768
- 4701 Montgomery Blvd NeAlbuquerque, NM 87109-1219Phone: (505) 727-8360Fax: (505) 727-8768
- 2121 Juan Tabo Blvd NeAlbuquerque, NM 87112Phone: (505) 237-8800Fax: (505) 237-8801
Registry dates
- Enumerated
- 2007-01-02
- Last updated
- 2023-02-09
- Certified
- 2023-02-09
Frequently asked questions
- What is Mary Brennan's NPI number?
- Mary Brennan's National Provider Identifier (NPI) is 1952468670, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Brennan's specialty?
- Mary Brennan is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Brennan located?
- Mary Brennan's practice location on file with NPPES is 1454 Fairfield Loop Rd, Crownsville, MD 21032-2006.
- What is Mary Brennan's phone number?
- The practice phone number listed in the NPPES registry for Mary Brennan is (410) 987-6338.
- Does Mary Brennan accept Medicare?
- Mary Brennan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Brennan's NPI active?
- Yes — Mary Brennan's NPI (1952468670) is active in the NPPES registry as of the last update on 2023-02-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.