DR. JONATHAN EISEN M.D.
NPI 1396126686
Internal Medicine in Boston, MA

Q: What is Jonathan Eisen's NPI number?

The NPI number for Jonathan Eisen is 1396126686. It was assigned to this individual provider in the NPPES registry on June 12, 2015.

Q: What is Jonathan Eisen's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Jonathan Eisen was last updated on January 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months 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 June 12, 2015PECOS EnrolledAccepts Medicare Assignment

800 WASHINGTON ST, BOSTON, MA 02111(617) 636-5000 Get Directions Write a Review

NPPES record last updated: January 15, 2026. Verified against the NPPES registry weekly; last sync: August 30, 2026.

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About Dr. Jonathan Eisen M.d. NPPES

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

DR. JONATHAN EISEN M.D. (NPI 1396126686) is an individual internal medicine provider in Boston, Massachusetts, licensed in Massachusetts (263228) and active in the NPI registry since June 2015. He is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1396126686

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. JONATHAN EISENCredential: M.D.

Location Address800 WASHINGTON STBoston, MA 02111-1552

Mailing Address800 Washington StBoston, MA 02111-1552 · (617) 636-5000

Phone(617) 636-5000

Sole ProprietorNo

Medical School CMSOtherGraduated 2015

Enumeration DateJune 12, 2015

Last NPPES UpdateJanuary 15, 2026

NPPES CertifiedJanuary 15, 2026

✔ NPI 1396126686 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in MA · 263228

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

800 WASHINGTON ST, Boston, MA 02111

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Secondary Practice Locations 2

Location 11153 Centre StJamaica Plain, MA 02130-3446 · Phone (617) 983-7000

Location 275 Francis StBoston, MA 02115-6110 · Phone (617) 732-5500

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Jonathan Eisen 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 ID648579946

PECOS Enrollment IDI20180517000398

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.

Areas of Expertise CMS Part B claims 3

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

178 services82 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

44 services44 patients

Hospital discharge day management, more than 30 minutes 99239

Hospital discharge day management over 30 minutes involves a detailed process to ensure a smooth transition from hospital to home. It includes final examinations, discussion of your hospital stay, post-discharge instructions, and coordinating follow-up care.

33 services33 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Massachusetts General Hospital

Acute Care Hospitals · Boston, MA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220071

Location55 Fruit StreetBoston, MA 02114 · Suffolk County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02111 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$144.11 typical visit price

range $63.72 – $189.86

Typical copayment $36.02 (range $15.93 – $47.46)

Most-billed visit code 99204

Established Patient

$111.18 typical visit price

range $21.07 – $155.29

Typical copayment $27.79 (range $5.26 – $38.82)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

AARON DICKSTEIN M.D.

Internal Medicine (Gastroenterology)

800 WASHINGTON ST, BOX 233
BOSTON, MA 02111

Suffolk County (617) 636-5883

THOMAS E BIGELOW

Technician/Technologist (Optician)

800 WASHINGTON ST, BOX 450
BOSTON, MA 02111

Suffolk County (617) 636-5857

SARAH MERRIMAN PERSING M.D.

Plastic Surgery