JENNIFER C MILLEN M.D.
NPI 1831221795
Physical Medicine & Rehabilitation - Pain Medicine in Boston, MA

Q: What is Jennifer Millen's NPI number?

The NPI number for Jennifer Millen is 1831221795. It was assigned to this individual provider in the NPPES registry on March 9, 2007.

Q: What is Jennifer Millen's specialty?

The primary specialty registered for this NPI is Physical Medicine & Rehabilitation, specializing in Pain Medicine, with taxonomy code 2081P2900X.

Q: When was this NPI record last updated?

The NPPES record for Jennifer Millen was last updated on February 23, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since March 09, 2007PECOS EnrolledAccepts Medicare Assignment

133 BROOKLINE AVE, BOSTON, MA 02215(617) 421-8817(617) 421-2226 Get Directions Write a Review

NPPES record last updated: February 23, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Jennifer C Millen M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JENNIFER C MILLEN M.D. (NPI 1831221795) is an individual pain medicine provider in Boston, Massachusetts, licensed in Massachusetts (231050) and active in the NPI registry since March 2007. She is enrolled in Medicare PECOS and is a graduate of University Of California, Davis School Of Medicine (2005).

NPPES Registry Identity

NPI1831221795

Entity TypeIndividualFemale

Primary Taxonomy2081P2900X

Provider Legal NameJENNIFER C MILLENCredential: M.D.

Location Address133 BROOKLINE AVEBoston, MA 02215-3904

Mailing Address133 Brookline AveBoston, MA 02215-3904 · (617) 421-8817 · Fax (617) 421-2226

Phone(617) 421-8817

Fax(617) 421-2226

Sole ProprietorNo

Medical School CMSUniversity Of California, Davis School Of MedicineGraduated 2005

Enumeration DateMarch 9, 2007

Last NPPES UpdateFebruary 23, 2021

NPPES CertifiedFebruary 23, 2021

✔ NPI 1831221795 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPhysical Medicine & Rehabilitation · Pain MedicineAllopathic & Osteopathic Physicians

Taxonomy Code2081P2900X

License✔ Licensed in MA · 231050

Definition

A physician who provides a high level of care, either as a primary physician or consultant, for patients experiencing problems with acute, chronic or cancer pain in both hospital and ambulatory settings. Patient care needs may also be coordinated with other specialists.

Also ListedEmergency MedicineTaxonomy 207P00000X · License 231050 (MA)

133 BROOKLINE AVE, Boston, MA 02215

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Jennifer C Millen M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2264572866

PECOS Enrollment IDI20091211000439

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Jennifer Millen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Atrius Health, Inc.

Same address

Internal Medicine

133 BROOKLINE AVE
Boston, MA 02215

Reassigned Medicare billing, Massachusetts enrollment
1,317 clinicians in this Medicare group

NPI 1871639914 (617) 421-1000

The General Hospital Corporation

2.0 mi

General Acute Care Hospital

55 FRUIT ST, BULFINCH 360
Boston, MA 02114

Reassigned Medicare billing, Massachusetts enrollment
6,234 clinicians in this Medicare group

NPI 1023049236 (617) 726-2000

Massachusetts General Physicians Organization Inc

2.0 mi

Dermatology

55 FRUIT ST, BUL 2
Boston, MA 02114

Reassigned Medicare billing, Massachusetts enrollment
6,360 clinicians in this Medicare group

NPI 1801874573 (617) 724-0287

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 16

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Injection, triamcinolone acetonide, not otherwise specified, 10 mg J3301

Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.

712 services44 patients

Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg J0702

This injection contains two medications, betamethasone acetate and betamethasone sodium phosphate. It is used to reduce inflammation and pain. It's given by a healthcare professional, often directly into the area causing discomfort.

452 services74 patients

Low osmolar contrast material, 200-299 mg/ml iodine concentration, per ml Q9966

Low osmolar contrast material with 200-299 mg/ml iodine concentration is a type of dye used in certain medical tests like CT scans or X-rays. It helps to highlight specific areas in your body, making them easier to see and examine. It's safe and commonly used.

380 services177 patients

Injection, dexamethasone sodium phosphate, 1 mg J1100

Dexamethasone sodium phosphate is a medication given via injection. It is a type of steroid that helps reduce inflammation and immune responses. It can be used to treat a variety of conditions, such as allergies, skin conditions, arthritis, and more.

360 services27 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

171 services112 patients

Injection of substance into lower spine canal using imaging guidance 62323

This procedure involves injecting a substance into your lower spine canal, guided by real-time images. It's done to diagnose or treat various conditions. You may feel slight discomfort, but it's generally safe and can provide valuable information for your treatment plan.

168 services105 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

118 services118 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

103 services62 patients

Injection of substance into middle or upper spine canal using imaging guidance 62321

This procedure involves injecting a substance into your middle or upper spine canal. It's performed under imaging guidance to ensure accuracy. The substance can help diagnose or treat various conditions, providing relief from symptoms.

79 services62 patients

Injection of lower or sacral spine facet joint using imaging guidance, single level 64493

This procedure involves injecting medication into the facet joint in your lower back or sacral spine. It's done under imaging guidance to ensure accuracy. The aim is to alleviate pain and inflammation. It's a safe, often effective method for managing spinal discomfort.

45 services29 patients

Injection of lower or sacral spine facet joint using imaging guidance, second level 64494

This procedure involves injecting medication into the facet joints of your lower or sacral spine to manage pain. Imaging guidance ensures accurate placement. It's the second level, meaning it's done on two different joint levels.

44 services28 patients

Injection, methylprednisolone acetate, 80 mg J1040

Methylprednisolone acetate is a strong anti-inflammatory medication. It is often given as an 80 mg injection to reduce inflammation and pain. It's commonly used for conditions like arthritis, allergic disorders, or other inflammatory diseases.

37 services30 patients

Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level 64483

This procedure involves injecting a mix of numbing and anti-inflammatory medication into a specific nerve root in the lower back. It helps manage pain and reduce inflammation. The process is guided by imaging technology for precision.

30 services27 patients

Injection, methylprednisolone acetate, 40 mg J1030

Methylprednisolone acetate is a medication given through an injection. It's a type of corticosteroid, which reduces inflammation and immune responses. It can be used to treat various conditions like arthritis, allergies, and skin diseases. This dose is 40 mg.

27 services24 patients

Injection of upper or middle spine facet joint using imaging guidance, single level 64490

This procedure involves injecting medication into a joint in your upper or middle spine. It's performed under imaging guidance for precision. The aim is to reduce inflammation and pain. It's a single-level process, meaning one joint is treated at a time.

20 services16 patients

Injection of upper or middle spine facet joint using imaging guidance, second level 64491

This procedure involves injecting medication into the upper or middle spine facet joint, a small joint in your back. This is done under imaging guidance for precision. It's a second-level procedure, meaning it's done on two separate joints. It can help reduce pain and inflammation.

20 services16 patients

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MRS. MELISSA ASHLEY ZIOGAS APRN-FNP

Nurse Practitioner (Family)

133 BROOKLINE AVE
BOSTON, MA 02215

Suffolk County (617) 421-1000

SHIVAUN ELAINE PIKE NP

Nurse Practitioner (Adult Health)

133 BROOKLINE AVE
BOSTON, MA 02215

Suffolk County (617) 421-1000

HARRIET SCHEFT M.D.

Psychiatry & Neurology (Psychiatry)

133 BROOKLINE AVE
BOSTON, MA 02215

Suffolk County (617) 421-2040

CAROL J ZUCKERMAN M.D.

Internal Medicine

133 BROOKLINE AVE, INTERNAL MEDICINE
BOSTON, MA 02215

Suffolk County (617) 421-5804

HARVARD VANGUARD MEDICAL ASSOCIATES

Social Worker

133 BROOKLINE AVE
BOSTON, MA 02215

Suffolk County (617) 421-1000

DIANE L. GILWORTH NP

Registered Nurse

133 BROOKLINE AVE
BOSTON, MA 02215

Suffolk County (617) 421-6050

MARGARET SIDOR PHD, CGC

Genetic Counselor, MS

133 BROOKLINE AVE
BOSTON, MA 02215

Suffolk County (617) 421-1035

NED WILSON MORSE

Technician/Technologist (Optician)

133 BROOKLINE AVE
BOSTON, MA 02215

Suffolk County (174) 211-1496

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Jennifer Millen's NPI number?

The NPI number for Jennifer Millen is 1831221795. It was assigned to this individual provider in the NPPES registry on March 9, 2007.

Where is Jennifer Millen located?

Jennifer Millen practices at 133 Brookline Ave, Boston, MA 02215. The listed phone number is (617) 421-8817.

What is Jennifer Millen's specialty?

The primary specialty registered for this NPI is Physical Medicine & Rehabilitation, specializing in Pain Medicine, with taxonomy code 2081P2900X.

Is Jennifer Millen enrolled in Medicare?

Yes. Jennifer Millen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Jennifer Millen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Jennifer Millen reassigns Medicare benefits to 3 organizations: Atrius Health, Inc. (Boston, MA), The General Hospital Corporation (Boston, MA) and Massachusetts General Physicians Organization Inc (Boston, MA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Jennifer Millen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Jennifer Millen accept?

Health plans from Anthem Blue Cross and Blue Shield list Jennifer Millen as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Jennifer Millen was last updated on February 23, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.