William Gallagher, MD
NPI 1437187648 · Family Medicine Physician · Colmar Manor, MD
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Gallagher, MD is a Family Medicine Physician provider in Colmar Manor, MD (NPI 1437187648).
Provider details
- NPI number
- 1437187648
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- D47141 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
310 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 127 | $139 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 65 | $19 |
| Blood Glucose (sugar) Test Performed By Hand-Held Instrument82962 | 42 | $3 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 23 | $100 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 20 | $151 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 45 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 140 | 54 |
| Amlodipine Besylate | 127 | 56 |
| Lisinopril | 95 | 39 |
| Hydrochlorothiazide | 89 | 24 |
| Metformin Hcl | 66 | 32 |
| Gabapentin | 57 | 27 |
| Dulaglutidebrand: Trulicity |
Practice location
Mailing address
Additional practice locations (1)
- 1150 Varnum St NeWashington, DC 20017Phone: (202) 269-7000
Registry dates
- Enumerated
- 2006-06-28
- Last updated
- 2018-10-22
Frequently asked questions
- What is William Gallagher's NPI number?
- William Gallagher's National Provider Identifier (NPI) is 1437187648, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Gallagher's specialty?
- William Gallagher is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Gallagher located?
- William Gallagher's practice location on file with NPPES is 4151 Bladensburg Rd, Colmar Manor, MD 20722-1928.
- What is William Gallagher's phone number?
- The practice phone number listed in the NPPES registry for William Gallagher is (301) 699-7700.
- Does William Gallagher accept Medicare?
- William Gallagher is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Gallagher's NPI active?
- Yes — William Gallagher's NPI (1437187648) is active in the NPPES registry as of the last update on 2018-10-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.