John McCarthy, CRNP
Family Nurse Practitioner · Gaithersburg, MD
John McCarthy, CRNP is a family nurse practitioner with a practice address in Gaithersburg, Maryland, and NPI 1952814634, issued on Nov 16, 2017. Check the license (Maryland R135272, as entered in NPPES) with the Maryland board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John McCarthy
- Credential
- CRNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- R135272 MD
Self-reported in NPPES; status is on the state search - Practice location
- 21034 Woodfield RD, Gaithersburg, MD 20882
- Phone
- (301) 509-4150
- Enumerated
- Nov 16, 2017
- Record last updated
- Nov 16, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20251211000652); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 4,124 in Maryland → Look up another NPI →
Verify John McCarthy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maryland board licenses this profession
Search for license R135272Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
6% more Medicare Part D claims than the average family nurse practitioner in 2024
1,379 Medicare Part D claims for 241 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Atorvastatin Calcium95 claims
- Amlodipine Besylate73 claims
- Levothyroxine Sodium56 claims
- Metoprolol Succinate44 claims
- Escitalopram Oxalate42 claims
- Lisinopril42 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.
Industry payments in 2024: $73.13
4 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 99,489 providers of this specialty with any payment received $650.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Adventist Physician Services IncRockville, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John McCarthy among 4,124 family nurse practitioner records in Maryland
John McCarthy, CRNP is one of 4,124 family nurse practitioner records with a practice address in Maryland. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 39% of them.
- NPI issued2017 · 39% of these records are older, 57% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2013 · median 2019 among the 2,370 with a school on file
- Record last updated2017 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
59 family nurse practitioner records list a practice address in Gaithersburg
They are 59 of the 2,580 NPPES records with a practice address in Gaithersburg, and 4,124 family nurse practitioner records in Maryland.
All 4,124 in Maryland → Every provider in Gaithersburg → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Ellen OwusuLaytonsville, MD 208821942966890
- James Amara, NPGaithersburg, MD 208791114671880
- Kenia Baisden, FNPGaithersburg, MD 208791851141782
- Luzmaria Guillen, DNP FNP-BC RNGaithersburg, MD 208791386449981
- Joanne Kulesh, CRNP-FAMILYGaithersburg, MD 208791841759065
- Yen Le, FNPGaithersburg, MD 208791720768690
- Mariah Massie, FNPGaithersburg, MD 208791083309017
- Melodie MbebiGaithersburg, MD 208791891501078
Common questions
What is John McCarthy, CRNP's NPI number?
John McCarthy, CRNP's National Provider Identifier (NPI) is 1952814634, issued on Nov 16, 2017. An NPI identifies a provider in billing; it is not a license.
Where is John McCarthy, CRNP located?
The NPPES record lists a practice address at 21034 Woodfield RD, Gaithersburg, MD, 20882. Phone: (301) 509-4150. Providers update this record themselves, so call before visiting.
How can I verify John McCarthy, CRNP's license?
NPPES lists Maryland license number R135272, as entered by the provider. Search the Maryland board that licenses this profession; the NPPES record confirms identity only.
How much does John McCarthy, CRNP prescribe under Medicare Part D?
In 2024, John McCarthy, CRNP had 1,379 Medicare Part D claims for 241 beneficiaries; the average among family nurse practitioner prescribers was 1,305. 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.