2026 NPPES data Specialist NPI 1629026240 MD
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MARK HIRSCHHORN, MD

Specialist in BIDDEFORD, Maine. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
502
Medicare Part D claims · 171 beneficiaries · Specialist avg: 1K
Generic prescribing
78%
generic claims · 22% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.4K
12 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: MARK HIRSCHHORN, MD is a Specialist ([object Object]) practicing in BIDDEFORD, Maine with a Medicare Part D prescribing footprint of 502 claims across 171 beneficiaries — 22% brand-name prescribing . Industry payments of $1.4K across 12 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: MARK HIRSCHHORN, MD filed 502 Medicare Part D claims in 2023 across BIDDEFORD, Maine. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

MARK HIRSCHHORN, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 05/05/2006

NPI 1629026240

Primary specialty

Specialist

High-volume

69,658 US NPIs in this specialty

Medicare Part D claims

502 66% vs specialty avg

2023 prescription claims

Specialty avg: 1,474

Specialty distribution in Maine

How Specialist compares to other specialties among Maine providers

Maine providers

Specialist share within Maine

1. Specialist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Specialist share within Maine

Specialty board-certification context

Estimated specialty board-certified rate — Specialist (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Specialist ABMS/AOA estimate

Est. board-certified rate (Specialist) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Specialist) — ABMS / AOA estimate

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).

MARK HIRSCHHORN, MD is a Specialist provider practicing in BIDDEFORD, Maine, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1629026240. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

MARK HIRSCHHORN, MD appears in the CMS NPPES registry as a Specialist provider holding MD credentials at 24 W COLE RD, BIDDEFORD, ME, 04005, with a listed phone of (207) 283-1602. NPI 1629026240 was issued on 05/05/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what HIRSCHHORN 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 502 prescription claims written by this provider, covering 171 Medicare beneficiaries and totaling roughly $127K in drug spend, split 22% brand-name and 78% 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.

Specialist is a high-volume specialty nationwide, with 69,658 enrolled providers across 55 states and an average of 1,474 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

24 W COLE RD
BIDDEFORD, ME 04005

Provider Details

NPI 1629026240
Specialty Specialist
Credentials MD
Gender Male
NPI Issued 05/05/2006

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for MARK HIRSCHHORN, MD. Source: openpaymentsdata.cms.gov.

Total received

$1.4K

Largest payer

COLOPLAST CORP

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Brand vs generic prescribing mix · Typical

MARK HIRSCHHORN, MD — brand share 22.0%
Specialty average (est.)

22% brand-name claims vs 78% generic, on 502 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.

502
Total Claims
$127K
Total Drug Cost
171
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,003
Total Day Supply
26,248
Brand vs Generic
22% brand / 78% generic
Brand Drug Cost
$116K
Generic Drug Cost
$11K
Antibiotic Claims
131

Patient Demographics

Average Patient Age
73.1 years
Avg HCC Risk Score
1.20
Gender Split
39% female / 61% male
Age Distribution
<65: 21, 65-74: 78, 75-84: 55, 85+: 17

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Tamsulosin Hcl
115
Myrbetriq
Mirabegron
102
Cefadroxil
47
Dutasteride
33
Sulfamethoxazole-Trimethoprim
Sulfamethoxazole/Trimethoprim
27
Finasteride
24
Estradiol
14
Amoxicillin-Clavulanate Potass
Amoxicillin/Potassium Clav
11
Levofloxacin
11
Solifenacin Succinate
11

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

Specialist Overview

How MARK HIRSCHHORN, MD fits within the Specialist landscape nationally.

69,658
Specialist Providers in US
55
States with Specialist
1,474
Avg Claims per Provider

MARK HIRSCHHORN, MD's 502 claims are below the specialty average of 1,474.

Nearby Specialist Providers in Maine

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

Compare Specialist nationally: see state-by-state distribution →

Frequently Asked Questions

What is MARK HIRSCHHORN, MD's specialty?
MARK HIRSCHHORN, MD specializes in Specialist and practices in BIDDEFORD, Maine. Credentials: MD.
How much does MARK HIRSCHHORN, MD prescribe under Medicare Part D?
In 2023, MARK HIRSCHHORN, MD wrote 502 Medicare Part D claims totaling $127K in drug costs for 171 beneficiaries.
Where is MARK HIRSCHHORN, MD located?
MARK HIRSCHHORN, MD is located at 24 W COLE RD, BIDDEFORD, ME, 04005. Phone: (207) 283-1602.
What is MARK HIRSCHHORN, MD's NPI number?
MARK HIRSCHHORN, MD's National Provider Identifier (NPI) is 1629026240, issued on 05/05/2006.
Does MARK HIRSCHHORN, MD prescribe more brand-name or generic drugs?
MARK HIRSCHHORN, MD's prescribing is 22% brand-name and 78% generic drugs by claim count, with $116K in brand drug costs.
How many Specialist providers are there in the US?
There are 69,658 Specialist providers across 55 states in the US. The average Specialist provider writes 1,474 Medicare Part D claims per year.
What drugs does MARK HIRSCHHORN, MD prescribe most often?
Based on 2023 Medicare Part D data, MARK HIRSCHHORN, MD's most frequently prescribed drugs include Tamsulosin Hcl, Myrbetriq, Cefadroxil. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MARK HIRSCHHORN, MD accept Medicare?
MARK HIRSCHHORN, MD appears in CMS Medicare data with 502 Part D claims and 171 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MARK HIRSCHHORN, MD's credentials?
MARK HIRSCHHORN, MD's NPI is 1629026240 with credentials MD. 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