Catherine M. Mullin, FNP
Internal Medicine Physician · Osterville, MA
Catherine M. Mullin, FNP is an internal medicine physician with a practice address in Osterville, Massachusetts, and NPI 1952986721, issued on Mar 13, 2021. Check the license (Massachusetts RN2294958, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Catherine M. Mullin
- Credential
- FNP
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- RN2294958 MA
Self-reported in NPPES; status is on the state search - Practice location
- 770 Main St, Osterville, MA 02655
- Phone
- (774) 552-3201
- Enumerated
- Mar 13, 2021
- Record last updated
- Sep 9, 2024
- Medicare enrollment
- Enrolled (PECOS I20240819000701); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 770 Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Lisamarie Bertschy, FNP-BCFamily Nurse Practitioner1467189035
Verify Catherine M. Mullin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license RN2294958Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average internal medicine physician in 2024
240 Medicare Part D claims for 117 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Rosuvastatin Calcium12 claims
- Albuterol Sulfate Hfa11 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.
Bills Medicare through one group practice
- Medical Affiliates OF Cape Cod IncOsterville, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Catherine M. Mullin among 6,825 internal medicine physician records in Massachusetts
Catherine M. Mullin, FNP is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 89% of them.
- NPI issued2021 · 89% of these records are older, 8% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2023 · median 2004 among the 4,103 with a school on file
- Record last updated2024 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
3 internal medicine physician records list a practice address in Osterville
They are 3 of the 45 NPPES records with a practice address in Osterville, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Osterville → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Mark Collins, MDOsterville, MA 026551255368494
- Paul Jaques, M.D.Osterville, MA 026551750365227
- Roxanne Cumming, MDOrleans, MA 026531770547564
- Brian Daggett, MDOrleans, MA 026531114925716
- Pamela French,, MDProvincetown, MA 026571134721392
- Andrew Jorgensen, M.D.Provincetown, MA 026571134106271
- Donna Krauth, M.D.Provincetown, MA 026571548286321
- Brian O'Malley, M.D.Provincetown, MA 026571083653646
Common questions
What is Catherine M. Mullin, FNP's NPI number?
Catherine M. Mullin, FNP's National Provider Identifier (NPI) is 1952986721, issued on Mar 13, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Catherine M. Mullin, FNP located?
The NPPES record lists a practice address at 770 Main St, Osterville, MA, 02655. Phone: (774) 552-3201. Providers update this record themselves, so call before visiting.
How can I verify Catherine M. Mullin, FNP's license?
NPPES lists Massachusetts license number RN2294958, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Catherine M. Mullin, FNP prescribe under Medicare Part D?
In 2024, Catherine M. Mullin, FNP had 240 Medicare Part D claims for 117 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.