Nicholas Robert Mahoney, MD
Ophthalmology Physician · Baltimore, MD
Nicholas Robert Mahoney, MD is an ophthalmology physician with a practice address in Baltimore, Maryland, and NPI 1194875864, issued on Jan 12, 2007. Check the license (Maryland D70837, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Nicholas Robert Mahoney
- Credential
- MD
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License numbers
- D70837 MD
MT188147 PA
Self-reported in NPPES; status is on the state search - Practice location
- 600 N Wolfe St, Baltimore, MD 21287
- Phone
- (410) 955-1112
- Enumerated
- Jan 12, 2007
- Record last updated
- Apr 29, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (410) 614-9987
- Medicaid ID
- 036177100 MD
- Medicare enrollment
- Enrolled (PECOS I20101105000360); may accept Medicare assignment
- Medical or professional school
- Perelman School Of Med At The University Of Pennsylvania, 2006
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 588 in Maryland → Look up another NPI →
Also registered at 600 N Wolfe St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Nicholas Robert Mahoney in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D70837Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average ophthalmology physician in 2024
305 Medicare Part D claims for 168 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 25% of claims. 24 claims were for opioids.
Most prescribed
- Erythromycin109 claims
- Tobramycin-Dexamethasone30 claims
- Tramadol Hcl22 claims
- Loteprednol Etabonate16 claims
- Azithromycin15 claims
- Tobradex13 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $3,837.46
8 payments; by number, the most common kind was food and beverage; the largest payer was Synthes GmbH. The 13,221 providers of this specialty with any payment received $4,535.02 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 2 group practices
- Johns Hopkins UniversityLutherville, MD
- Johns Hopkins UniversityWashington, DC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nicholas Robert Mahoney among 588 ophthalmology physician records in Maryland
Nicholas Robert Mahoney, MD is one of 588 ophthalmology physician records with a practice address in Maryland. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 56% of them.
- NPI issued2007 · 56% of these records are older, 34% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2006 · median 2002 among the 369 with a school on file
- Record last updated2016 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Maryland
There are 588 ophthalmology physician records in Maryland.
All 588 in Maryland → Every provider in Baltimore → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Esen Akpek, M.D.Baltimore, MD 212871851356943
- John Baer, M.D.Baltimore, MD 212871013984848
- Heather Bartlett Casparis, M.D.Baltimore, MD 212871629033147
- Neil Bressler, M.D.Baltimore, MD 212871790742245
- Peter Campochiaro, M.D.Baltimore, MD 212871598723850
- Marianne Cowley, MDBaltimore, MD 212871811964448
- Earl Craven, MDBaltimore, MD 212871457354821
- Morton Goldberg, M.D.Baltimore, MD 212871578516696
Common questions
What is Nicholas Robert Mahoney, MD's NPI number?
Nicholas Robert Mahoney, MD's National Provider Identifier (NPI) is 1194875864, issued on Jan 12, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Nicholas Robert Mahoney, MD located?
The NPPES record lists a practice address at 600 N Wolfe St, Baltimore, MD, 21287. Phone: (410) 955-1112. Providers update this record themselves, so call before visiting.
How can I verify Nicholas Robert Mahoney, MD's license?
NPPES lists Maryland license number D70837, 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 Nicholas Robert Mahoney, MD prescribe under Medicare Part D?
In 2024, Nicholas Robert Mahoney, MD had 305 Medicare Part D claims for 168 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
What is Nicholas Robert Mahoney, MD's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.