Caryn A. Libbey, M.D.
Rheumatology Physician · Boston, MA
Caryn A. Libbey, M.D. is a rheumatology physician with a practice address in Boston, Massachusetts, and NPI 1417934142, issued on Dec 23, 2005. Check the license (Massachusetts 43031, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Caryn A. Libbey
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 43031 MA
Self-reported in NPPES; status is on the state search - Practice location
- 725 Albany St, Boston, MA 02118
- Phone
- (617) 638-7460
- Enumerated
- Dec 23, 2005
- Record last updated
- Apr 23, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (617) 638-5226
- Medicaid IDs
- 0130923 MA
8111-0208 NH - Medicare enrollment
- Enrolled (PECOS I20120320000277); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 1975
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 343 in Massachusetts → Look up another NPI →
Also registered at 725 Albany St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Paul Ambrose, PA-CPhysician Assistant1730631557
- Naomi Amudala, NPFamily Nurse Practitioner1154655348
- Tufik Assad, M.D.Pulmonary Disease Physician1093941890
Verify Caryn A. Libbey in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 43031Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
68% fewer Medicare Part D claims than the average rheumatology physician in 2024
642 Medicare Part D claims for 90 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims. 41 claims were for opioids.
Most prescribed
- Methotrexate101 claims
- Hydroxychloroquine Sulfate68 claims
- Prednisone55 claims
- Meloxicam42 claims
- Tramadol Hcl40 claims
- Enbrel Sureclick26 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
- Evans Medical Foundation IncBoston, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Caryn A. Libbey among 343 rheumatology physician records in Massachusetts
Caryn A. Libbey, M.D. is one of 343 rheumatology physician records with a practice address in Massachusetts. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1975 · median 2004 among the 212 with a school on file
- Record last updated2013 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Massachusetts
There are 343 rheumatology physician records in Massachusetts.
All 343 in Massachusetts → Every provider in Boston → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Hyon-Kyoo Choi, MD, PHDBoston, MA 021181629157128
- Sonali Desai, M.D.Boston, MA 021181952420879
- Maureen Dubreuil, MDBoston, MA 021181053586784
- David Felson, MDBoston, MA 021181942266655
- Peter Grayson, MDBoston, MA 021181639195571
- David Hunter, M.D.Boston, MA 021181649238999
- Eugene Kissin, M.D.Boston, MA 021181295770386
- Robert LafyatisBoston, MA 021181902896822
Common questions
What is Caryn A. Libbey, M.D.'s NPI number?
Caryn A. Libbey, M.D.'s National Provider Identifier (NPI) is 1417934142, issued on Dec 23, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Caryn A. Libbey, M.D. located?
The NPPES record lists a practice address at 725 Albany St, Boston, MA, 02118. Phone: (617) 638-7460. Providers update this record themselves, so call before visiting.
How can I verify Caryn A. Libbey, M.D.'s license?
NPPES lists Massachusetts license number 43031, 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 Caryn A. Libbey, M.D. prescribe under Medicare Part D?
In 2024, Caryn A. Libbey, M.D. had 642 Medicare Part D claims for 90 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.