Anna Ost, NP
Adult Health Nurse Practitioner · Cambridge, MA
Anna Ost, NP is an adult health nurse practitioner with a practice address in Cambridge, Massachusetts, and NPI 1649689878, issued on Aug 13, 2014. Check the license (Massachusetts RN270800, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Anna Ost
- Credential
- NP
- Primary taxonomy
- Adult Health Nurse Practitioner 363LA2200X
- License number
- RN270800 MA
Self-reported in NPPES; status is on the state search - Practice location
- 725 Concord Ave, Cambridge, MA 02138
- Phone
- (617) 864-8822
- Enumerated
- Aug 13, 2014
- Record last updated
- Aug 13, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20170923000085); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest adult health nurse practitioner records → All 1,465 in Massachusetts → Look up another NPI →
Also registered at 725 Concord Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Anna Ost in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license RN270800Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
62% more Medicare Part D claims than the average adult health nurse practitioner in 2024
2,077 Medicare Part D claims for 423 beneficiaries, against an average of 1,280 among the 16,937 providers of this specialty who prescribed in Part D. 24 claims were for opioids.
Most prescribed
- Atorvastatin Calcium158 claims
- Lisinopril131 claims
- Amlodipine Besylate106 claims
- Metoprolol Succinate88 claims
- Omeprazole83 claims
- Losartan Potassium80 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
- Mount Auburn Professional Services IncLexington, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Anna Ost among 1,465 adult health nurse practitioner records in Massachusetts
Anna Ost, NP is one of 1,465 adult health nurse practitioner records with a practice address in Massachusetts. 61% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 76% of them.
- NPI issued2014 · 76% of these records are older, 20% newer
- In a Medicare fileYes · 61% of these records are
- In the CMS Doctors and Clinicians fileYes · 43% of these records are
- Graduated2014 · median 2010 among the 634 with a school on file
- Record last updated2014 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LA2200X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Adult Health Nurse Practitioner providers in Massachusetts
There are 1,465 adult health nurse practitioner records in Massachusetts.
All 1,465 in Massachusetts → Every provider in Cambridge → Adult Health Nurse Practitioner nationwide →
The 8 adult health nurse practitioner records with the nearest ZIP codes
- Laura Borgia, CRNPCambridge, MA 021381881714327
- Joanne Casaletto, NPCambridge, MA 021381457475717
- Cristina Collins, NPCambridge, MA 021381235109935
- Kathleen Corbo, NPCambridge, MA 021381134170889
- Addie Day, RN, ANP-CCambridge, MA 021381104251602
- E. Flory, RN,MS,NPCambridge, MA 021381871641886
- Nancy Hays, NPCambridge, MA 021381396793410
- Richard Lambert, NPCambridge, MA 021381083698864
Common questions
What is Anna Ost, NP's NPI number?
Anna Ost, NP's National Provider Identifier (NPI) is 1649689878, issued on Aug 13, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Anna Ost, NP located?
The NPPES record lists a practice address at 725 Concord Ave, Cambridge, MA, 02138. Phone: (617) 864-8822. Providers update this record themselves, so call before visiting.
How can I verify Anna Ost, NP's license?
NPPES lists Massachusetts license number RN270800, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Anna Ost, NP prescribe under Medicare Part D?
In 2024, Anna Ost, NP had 2,077 Medicare Part D claims for 423 beneficiaries; the average among adult health nurse practitioner prescribers was 1,280. 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.