2026 NPPES data Gastroenterology Physician NPI 1790900140 M.D.
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Joshua Namias, M.D.

Gastroenterology Physician in Salem, Massachusetts. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,567 in Gastroenterology Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.

Federal data, no proprietary rating. We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
418
Medicare Part D claims · 135 beneficiaries · Gastroenterology Physician avg: 833
Generic prescribing
82%
generic claims · 18% brand-name · higher generic rates reduce patient out-of-pocket costs
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Joshua Namias, M.D. filed 418 Medicare Part D claims in 2023 as a Gastroenterology Physician in Salem, Massachusetts, prescribing 82% generic.

418
Part D claims, 2023
82%
generic prescribing
Likely
board-certified (heuristic)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.

Joshua Namias, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023, across all CMS prescribers nationally

418 Top 38% higher than 62% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). This entry sits in this band. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2K+: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic, not verified)

Joshua Namias, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about Joshua Namias, M.D.?

Quality data not reported

NPI registry status

Active

Issued 04/13/2007

NPI 1790900140

Primary specialty

Gastroenterology Physician

Mid-sized

16,567 US NPIs in this specialty

Medicare Part D claims

418 50% vs specialty avg

2023 prescription claims

Specialty avg: 833

Specialty distribution in Massachusetts

How Gastroenterology Physician compares to other specialties among Massachusetts providers

Massachusetts providers

Largest specialties in Massachusetts (% of in-state providers)

Mental Health Counselor - 8.3%Mental Health Counselor8.3%Clinical Social Worker - 7.8%Clinical Social Worker7.8%Student in an Organized Health Care Education/Training Program - 6.2%Student in an Organized Health Care Education/Training Program6.2%Behavior Technician - 4.9%Behavior Technician4.9%Counselor - 4.3%Counselor4.3%Internal Medicine Physician - 3.7%Internal Medicine Physician3.7%Gastroenterology Physician - 0.2%Gastroenterology Physician0.2%
Largest specialties in Massachusetts (% of in-state providers)

Board certification

Not published by CMS

CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Gastroenterology Physician. Verify directly:

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

Joshua Namias, M.D. appears in the CMS NPPES registry as a Gastroenterology Physician provider holding M.D. credentials at 55 HIGHLAND AVE, Salem, MA, 01970, with a listed phone of (978) 741-4171. NPI 1790900140 was issued on 04/13/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Namias most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 418 prescription claims written by this provider, covering 135 Medicare beneficiaries and totaling roughly $260K in drug spend, split 18% brand-name and 82% generic by claim count. These figures capture only Medicare Part D, commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Gastroenterology Physician is a mid-sized specialty nationwide, with 16,567 enrolled providers across 54 states and an average of 833 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

55 HIGHLAND AVE
Salem, MA 01970

Provider Details

NPI 1790900140
Specialty Gastroenterology Physician
Credentials M.D.
Gender Male
NPI Issued 04/13/2007

Hospital and facility affiliations

Facilities where Joshua Namias, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

Mass General Brigham Medical Group Northern Massachusetts Inc
Danvers, MA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

License & disciplinary context - Massachusetts BORIM 2023 annual report

Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~38K Massachusetts medical licensees in 2023 - they are NOT specific to Joshua Namias, M.D.. To verify Joshua Namias, M.D.'s current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases

BORIM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Typical

Joshua Namias, M.D. - brand share 18.0%
Gastroenterology Physician average

18% brand-name claims vs 82% generic, on 418 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

418
Total Claims
$260K
Total Drug Cost
135
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
709
Total Day Supply
20,291
Brand vs Generic
18% brand / 82% generic
Brand Drug Cost
$224K
Generic Drug Cost
$36K
Antibiotic Claims
18

Patient Demographics

Average Patient Age
71.4 years
Avg HCC Risk Score
1.14
Gender Split
62% female / 38% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What Joshua Namias, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Omeprazole
119
Pantoprazole Sodium
47
Sucralfate
31
Mesalamine Er
Mesalamine
30
Esomeprazole Magnesium
28
Humira Pen
Adalimumab
24
Balsalazide Disodium
21
Famotidine
15
Mesalamine
14
Linzess
Linaclotide
13

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Gastroenterology Physician Overview

How Joshua Namias, M.D. fits within the Gastroenterology Physician landscape nationally.

16,567
Gastroenterology Physician Providers in US
54
States with Gastroenterology Physician
833
Avg Claims per Provider

Joshua Namias, M.D.'s 418 claims are below the specialty average of 833.

Nearby Gastroenterology Physician Providers in Massachusetts

Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Namias.

Compare Gastroenterology Physician nationally: see state-by-state distribution →

Before you book an appointment

Use this federal record as your verification checklist, not as a recommendation.

  • Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
  • Check the active license and any disciplinary history with the Massachusetts medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Gastroenterology Physician peer on Medicare volume and prescribing patterns. Compare providers

Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.

Frequently Asked Questions

What is Joshua Namias, M.D.'s specialty?
Joshua Namias, M.D. specializes in Gastroenterology Physician and practices in Salem, Massachusetts. Credentials: M.D..
How much does Joshua Namias, M.D. prescribe under Medicare Part D?
In 2023, Joshua Namias, M.D. wrote 418 Medicare Part D claims totaling $260K in drug costs for 135 beneficiaries.
Where is Joshua Namias, M.D. located?
Joshua Namias, M.D. is located at 55 HIGHLAND AVE, Salem, MA, 01970. Phone: (978) 741-4171.
What is Joshua Namias, M.D.'s NPI number?
Joshua Namias, M.D.'s National Provider Identifier (NPI) is 1790900140, issued on 04/13/2007.
Does Joshua Namias, M.D. prescribe more brand-name or generic drugs?
Joshua Namias, M.D.'s prescribing is 18% brand-name and 82% generic drugs by claim count, with $224K in brand drug costs.
How many Gastroenterology Physician providers are there in the US?
There are 16,567 Gastroenterology Physician providers across 54 states in the US. The average Gastroenterology Physician provider writes 833 Medicare Part D claims per year.
What drugs does Joshua Namias, M.D. prescribe most often?
Based on 2023 Medicare Part D data, Joshua Namias, M.D.'s most frequently prescribed drugs include Omeprazole, Pantoprazole Sodium, Sucralfate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Joshua Namias, M.D. accept Medicare?
Joshua Namias, M.D. appears in CMS Medicare data with 418 Part D claims and 135 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Joshua Namias, M.D.'s credentials?
Joshua Namias, M.D.'s NPI is 1790900140 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology

Compiled from official public sources by the PlainDoctor editorial team.