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DR. MARK M POMERANTZ MD
NPI 1194701599
Internal Medicine in Boston, MA

Active since December 16, 2005PECOS EnrolledAccepts Medicare Assignment
86.28/100
CMS Quality Rating
55 FRUIT ST YAW 7604, MASSACHUSETTS GENERAL HOSPITAL, BOSTON, MA 02114(617) 724-2241 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 13, 2026, Sep 11, 2025 (2 updates tracked since 2025).

About Dr. Mark M Pomerantz Md NPPES

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

DR. MARK M POMERANTZ MD (NPI 1194701599) is an individual internal medicine provider in Boston, Massachusetts, licensed in Massachusetts (219945) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS, is affiliated with Cooley Dickinson Hospital Inc,the, and is a graduate of Stanford University School Of Medicine (2001).

NPPES Registry Identity

NPI1194701599
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. MARK M POMERANTZCredential: MD
Location Address55 FRUIT ST YAW 7604, MASSACHUSETTS GENERAL HOSPITALBoston, MA 02114-2696
Mailing AddressPo Box 9142, Mass. General Physician OrganizationCharlestown, MA 02129-9142 · (617) 724-0287 · Fax (617) 726-2894
Phone(617) 724-2241
Sole ProprietorNo
Medical School CMSStanford University School Of MedicineGraduated 2001
Enumeration DateDecember 16, 2005
Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration
✔ NPI 1194701599 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MA · 219945
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.
Also ListedInternal Medicine · Hematology & OncologyTaxonomy 207RH0003X · License 219945 (MA)
55 FRUIT ST YAW 7604, Boston, MA 02114
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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, Taro Health.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

Dr. Mark M Pomerantz Md 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 ID4385743459
PECOS Enrollment IDI20070702000118
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 Reassignment

Medicare enrollment records show Mark Pomerantz reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Dana-Farber Cancer Institute, Inc.
2.7 mi
General Acute Care Hospital
450 BROOKLINE AVE
Boston, MA 02215
  • Reassigned Medicare billing, Massachusetts enrollment
  • Also billed through NPI 1346433257 (Massachusetts)
  • 1,026 clinicians in this Medicare group
NPI 1851333686 (617) 632-3000

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 9

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.

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.
303 services168 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.
154 services103 patients
Telephone medical discussion with physician, 11-20 minutes 99442
This is a service where you have a phone conversation with your doctor for 11-20 minutes. It's used for discussing health concerns, reviewing test results, or managing ongoing conditions. It's a convenient way to receive medical advice without an in-person visit.
40 services35 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
39 services39 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
29 services29 patients
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.
23 services14 patients

Hospital Affiliations CMS Care Compare 4

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

Cooley Dickinson Hospital Inc,the

Acute Care Hospitals · Northampton, MA
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220015
Location30 Locust StreetNorthampton, MA 01060 · Hampshire County
Emergency services Birthing friendly

North Shore Medical Center -

Acute Care Hospitals · Salem, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220035
Location81 Highland AvenueSalem, MA 01970 · Essex County
Emergency services Birthing friendly

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

Brigham And Women's Hospital

Acute Care Hospitals · Boston, MA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number220110
Location75 Francis StreetBoston, MA 02115 · Suffolk County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02114 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

86.28/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality69.36
Promoting Interoperability100
Improvement Activities40

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 Mark Pomerantz's NPI number?

The NPI number for Mark Pomerantz is 1194701599. It was assigned to this individual provider in the NPPES registry on December 16, 2005.

Where is Mark Pomerantz located?

Mark Pomerantz practices at 55 Fruit St Yaw 7604 Massachusetts General Hospital, Boston, MA 02114. The listed phone number is (617) 724-2241.

What is Mark Pomerantz's specialty?

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

Is Mark Pomerantz enrolled in Medicare?

Yes. Mark Pomerantz 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 organization bills Medicare for Mark Pomerantz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Pomerantz reassigns Medicare benefits to Dana-Farber Cancer Institute, Inc. (Boston, MA). The 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 Mark Pomerantz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mark Pomerantz accept?

Health plans from Anthem Blue Cross and Blue Shield and Taro Health list Mark Pomerantz 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.

Is Mark Pomerantz affiliated with any hospitals?

According to CMS data, Mark Pomerantz is affiliated with Cooley Dickinson Hospital Inc,the, North Shore Medical Center -, Massachusetts General Hospital and Brigham And Women's Hospital.

When was this NPI record last updated?

The NPPES record for Mark Pomerantz was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.