William Gallagher, MD
Family Medicine Physician · Colmar Manor, MD
William Gallagher, MD is a family medicine physician with a practice address in Colmar Manor, Maryland, and NPI 1437187648, issued on Jun 28, 2006. Check the license (Maryland D47141, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- William Gallagher
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- D47141 MD
Self-reported in NPPES; status is on the state search - Practice location
- 4151 Bladensburg RD, Colmar Manor, MD 20722
- Phone
- (301) 699-7700
- Enumerated
- Jun 28, 2006
- Record last updated
- Oct 22, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (301) 779-9001
- Medicare enrollment
- Enrolled (PECOS I20111209000265); accepts Medicare assignment
- Medical or professional school
- Temple University School Of Medicine, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 1,912 in Maryland → Look up another NPI →
Also registered at 4151 Bladensburg RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Georgette Adae-Mensah, MDStudent in an Organized Health Care Education/Training Program1073455648
- Rachelle Barrett Toman, M.D., PH.D.Family Medicine Physician1720233406
- Aerielle BookerStudent in an Organized Health Care Education/Training Program1417377011
- Tracy Cassagnol, MDStudent in an Organized Health Care Education/Training Program1295078921
- Kharastin Chea-Howard, MD, MPHStudent in an Organized Health Care Education/Training Program1629862792
- Aaron Gerstenmaier, M.D.Family Medicine Physician1851602767
Verify William Gallagher in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D47141Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average family medicine physician in 2024
1,886 Medicare Part D claims for 323 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 12 claims were for opioids.
Most prescribed
- Atorvastatin Calcium140 claims
- Amlodipine Besylate127 claims
- Lisinopril95 claims
- Hydrochlorothiazide89 claims
- Metformin Hcl66 claims
- Gabapentin57 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 80.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Medstar Medical Group II LLCWashington, DC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Gallagher among 1,912 family medicine physician records in Maryland
William Gallagher, MD is one of 1,912 family medicine physician records with a practice address in Maryland. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 13% of them.
- NPI issued2006 · 13% of these records are older, 54% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1993 · median 2004 among the 1,141 with a school on file
- Record last updated2018 · 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 Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
14 family medicine physician records list a practice address in Colmar Manor
They are 14 of the 40 NPPES records with a practice address in Colmar Manor, and 1,912 family medicine physician records in Maryland.
All 1,912 in Maryland → Every provider in Colmar Manor → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Rachelle Barrett Toman, M.D., PH.D.Colmar Manor, MD 207221720233406
- Aaron Gerstenmaier, M.D.Colmar Manor, MD 207221851602767
- Jamie Hill-Daniel, MDColmar Manor, MD 207221477739084
- Douglas Kamerow, M.D.Colmar Manor, MD 207221467665596
- Sadhana RajamoorthiColmar Manor, MD 207221770902801
- Breanna Ramsey, MDColmar Manor, MD 207221992646921
- Mia Riley, M.D.Colmar Manor, MD 207221225416050
- John Roegner, M.D.Colmar Manor, MD 207221700979937
Common questions
What is William Gallagher, MD's NPI number?
William Gallagher, MD's National Provider Identifier (NPI) is 1437187648, issued on Jun 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Gallagher, MD located?
The NPPES record lists a practice address at 4151 Bladensburg RD, Colmar Manor, MD, 20722. Phone: (301) 699-7700. Providers update this record themselves, so call before visiting.
How can I verify William Gallagher, MD's license?
NPPES lists Maryland license number D47141, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Gallagher, MD prescribe under Medicare Part D?
In 2024, William Gallagher, MD had 1,886 Medicare Part D claims for 323 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is William Gallagher, MD's MIPS final score?
The 2023 MIPS final score is 80.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.