NPI registry status
Active
2026 NPPES data Specialist NPI 1629026240 MD
Verify on CMS → Mark Hirschhorn, MD
Specialist in Biddeford, Maine.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 69,567 in Specialist, 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
620
Medicare Part D claims · 189 beneficiaries · Specialist avg: 2K
Generic prescribing
80%
generic claims · 20% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.4K
12 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Mark Hirschhorn, MD filed 620 Medicare Part D claims in 2024 as a Specialist in Biddeford, Maine, prescribing 80% generic.
- 620
- Part D claims, 2024
- 80%
- generic prescribing
- $1.4K
- industry payments (Sunshine Act)
- ≥68th
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Mark Hirschhorn, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1629026240), first enumerated 05/05/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 620 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Industry payment transparency
$1.4K in reported industry payments (12 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1629026240 · Specialist
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1629026240
- ENUM-LEGACY 2006
- TAX-MEGA 70K Specialist
- RX-LIGHT 620
- BOOK-THIN 269 in Maine
- PHOTO-ENUM Deanna Hahn, D.O. · 2006
Mark Hirschhorn, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
620 ≥ 68th percentile 68% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
What does the federal data show about Mark Hirschhorn, MD?
Quality data not reportedPrimary specialty
Specialist
Medicare Part D claims
620 59% vs specialty avg
Specialty distribution in Maine
How Specialist compares to other specialties among Maine 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 Specialist. Verify directly:
How MIPS and board certification work
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).
Practice Address
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 20.0%
Specialist average
20% brand-name claims vs 80% generic, on 620 2024 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 2024.
620
Total Claims
$128K
Total Drug Cost
189
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,206.3
- Total Day Supply
- 31,827
- Brand vs Generic
- 20% brand / 80% generic
- Brand Drug Cost
- $120K
- Generic Drug Cost
- $8K
- Opioid Claims
- 25 (4.0% rate)
- Antibiotic Claims
- 148
Patient Demographics
- Average Patient Age
- 73.7 years
- Avg HCC Risk Score
- 1.32
- Gender Split
- 30% female / 70% male
- Age Distribution
- <65: 21, 65-74: 80, 75-84: 66, 85+: 22
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Mark Hirschhorn, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Tamsulosin Hcl
Tamsulosin Hcl
173 claims
- Myrbetriq
Myrbetriq
101 claims
- Dutasteride 44
Dutasteride
44 claims
- Cefadroxil 42
Cefadroxil
42 claims
- Sulfamethoxazole-T… 36
Sulfamethoxazole-Trimethoprim
36 claims
- Ciprofloxacin Hcl 21
Ciprofloxacin Hcl
21 claims
- Tolterodine Tartra… 19
Tolterodine Tartrate Er
19 claims
- Gemtesa 17
Gemtesa
17 claims
| Drug | Claims |
|---|---|
| Tamsulosin Hcl | 173 |
| Myrbetriq Mirabegron | 101 |
| Dutasteride | 44 |
| Cefadroxil | 42 |
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 36 |
| Ciprofloxacin Hcl | 21 |
| Tolterodine Tartrate Er Tolterodine Tartrate | 19 |
| Gemtesa Vibegron | 17 |
| Methenamine Hippurate | 17 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 17 |
* 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.
69,567
Specialist Providers in US
55
States with Specialist
1,524
Avg Claims per Provider
Mark Hirschhorn, MD's 620 claims are below the specialty average of 1,524.
Nationwide Specialist peers with similar MIPS or enrollment year
Two federal-record peer sets for Hirschhorn, both outside Maine so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Specialist Providers in Maine
Other clinicians with the same primary specialty enrolled in Maine, drawn from the same CMS NPPES roster as Hirschhorn.
One of 269 Specialist providers enrolled in Maine, 5 are shown here.
Dr. George Abboud
MD
Biddeford, ME
Michele Achey
MT
Fryeburg, ME
Jennifer Adams
PTA, LMT
Westbrook, ME
Shannon Allen
Augusta, ME
Lia Angelini
MT
Farmingdale, ME
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 2024, Mark Hirschhorn, MD wrote 620 Medicare Part D claims totaling $128K in drug costs for 189 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 20% brand-name and 80% generic drugs by claim count, with $120K in brand drug costs.
Does Mark Hirschhorn, MD prescribe opioids? ▼
Yes, Mark Hirschhorn, MD had 25 opioid claims in 2024 with an opioid prescribing rate of 4.0%.
How many Specialist providers are there in the US? ▼
There are 69,567 Specialist providers across 55 states in the US. The average Specialist provider writes 1,524 Medicare Part D claims per year.
What drugs does Mark Hirschhorn, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Mark Hirschhorn, MD's most frequently prescribed drugs include Tamsulosin Hcl, Myrbetriq, Dutasteride. 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 620 Part D claims and 189 Medicare beneficiaries in 2024. 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
View source datasets and methodology notes
- 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 (2024). 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 August 2026 (NPPES) / 2024 (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
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.