NPPES file of Aug 9, 2026

Jennifer C. Millen, M.D.

Pain Medicine (Physical Medicine & Rehabilitation) Physician · Boston, MA

Jennifer C. Millen, M.D. is a pain medicine (physical medicine & rehabilitation) physician with a practice address in Boston, Massachusetts, and NPI 1831221795, issued on Mar 9, 2007. Check the license (Massachusetts 231050, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1831221795
Name
Jennifer C. Millen
Credential
M.D.
Primary taxonomy
Pain Medicine (Physical Medicine & Rehabilitation) Physician 2081P2900X
License number
231050 MA
Self-reported in NPPES; status is on the state search
Practice location
133 Brookline Ave, Boston, MA 02215
Phone
(617) 421-8817
Enumerated
Mar 9, 2007
Record last updated
Feb 23, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(617) 421-2226
Medicare enrollment
Enrolled (PECOS I20091211000439); accepts Medicare assignment
Medical or professional school
University Of California, Davis School Of Medicine, 2005
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest pain medicine (physical medicine & rehabilitation) physician records → All 30 in Massachusetts → Look up another NPI →

Also registered at 133 Brookline Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Shari Abramowitz, M.D.Pediatrics Physician1558346593
  2. Maansi AgheraAudiologist1225887292
  3. Nathalie Alexis, PSY.D.Clinical Psychologist1245886993
  4. Marina Alfisher, MDDiagnostic Radiology Physician1417925207
  5. Andrew Allmendinger, DODiagnostic Radiology Physician1972820942
  6. Dana An, LCSWClinical Social Worker1215108238

Verify Jennifer C. Millen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
    Search for license 231050    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Massachusetts license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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63% fewer Medicare Part D claims than the average pain medicine (physical medicine & rehabilitation) physician in 2024

547 Medicare Part D claims for 134 beneficiaries, against an average of 1,479 among the 1,457 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims. 23 claims were for opioids.

  1. Jennifer Millen547
  2. Specialty average1,479

Most prescribed

  1. Gabapentin169 claims
  2. Pregabalin63 claims
  3. Baclofen57 claims
  4. Duloxetine Hcl29 claims
  5. Meloxicam29 claims
  6. Celecoxib26 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

  1. Atrius Health IncNeedham, MA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Jennifer C. Millen among 30 pain medicine (physical medicine & rehabilitation) physician records in Massachusetts

Jennifer C. Millen, M.D. is one of 30 pain medicine (physical medicine & rehabilitation) physician records with a practice address in Massachusetts. 87% 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 30% of them.

  • NPI issued2007 · 30% of these records are older, 57% newer
  • In a Medicare fileYes · 87% of these records are
  • In the CMS Doctors and Clinicians fileYes · 87% of these records are
  • Graduated2005 · median 2005 among the 26 with a school on file
  • Record last updated2021 · 57% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2081P2900X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Pain Medicine (Physical Medicine & Rehabilitation) Physician providers in Massachusetts

There are 30 pain medicine (physical medicine & rehabilitation) physician records in Massachusetts.

All 30 in Massachusetts → Every provider in Boston → Pain Medicine (Physical Medicine & Rehabilitation) Physician nationwide →

The 8 pain medicine (physical medicine & rehabilitation) physician records with the nearest ZIP codes

  1. Joseph Audette, MDBoston, MA 022151992789911
  2. Karyn Carey, P.T.Medford, MA 021551891934352
  3. Sharon Bassi, MDBrighton, MA 021351033388277
  4. Kevin Vu, MDBoston, MA 021291144857780
  5. Adam Harris, M.D.Boston, MA 021201396192142
  6. Andrew Lederman, M.D.Boston, MA 021181801162862
  7. David Gallacher, MDBoston, MA 021151437757663
  8. Erika Yih, MDBoston, MA 021151609300896

Common questions

What is Jennifer C. Millen, M.D.'s NPI number?

Jennifer C. Millen, M.D.'s National Provider Identifier (NPI) is 1831221795, issued on Mar 9, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Jennifer C. Millen, M.D. located?

The NPPES record lists a practice address at 133 Brookline Ave, Boston, MA, 02215. Phone: (617) 421-8817. Providers update this record themselves, so call before visiting.

How can I verify Jennifer C. Millen, M.D.'s license?

NPPES lists Massachusetts license number 231050, 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 Jennifer C. Millen, M.D. prescribe under Medicare Part D?

In 2024, Jennifer C. Millen, M.D. had 547 Medicare Part D claims for 134 beneficiaries; the average among pain medicine (physical medicine & rehabilitation) physician prescribers was 1,479. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.