2026 NPPES data Specialist NPI 1538152574 M. D.
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Paul Harasimowicz, M. D.

Specialist in Ayer, 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 69,608 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
747
Medicare Part D claims · 125 beneficiaries · Specialist avg: 1K
Generic prescribing
93%
generic claims · 7% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
34/100
▼ 49 pts below national avg 83.1 · Below average
Industry payments
$3.5K
7 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Paul Harasimowicz, M. D. reported a CMS MIPS final score of 34/100 - below the 83.1 national average - and filed 747 Medicare Part D claims in 2023.

34/100
MIPS score · -49 vs avg
747
Part D claims, 2023
93%
generic prescribing
$3.5K
industry payments (Sunshine Act)

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.

Paul Harasimowicz, M. D.'s MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure

34 3rd percentile higher than 3% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). This entry sits in this band. 40–50: 2,928 scored providers (1%). Above this entry. 50–60: 5,882 scored providers (1%). Above this entry. 60–70: 13,906 scored providers (3%). Above this entry. 70–80: 118,074 scored providers (25%). Above this entry. 80–90: 129,887 scored providers (27%). Above this entry. 90+: 189,403 scored providers (40%). Above this entry. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023

Where Paul Harasimowicz, M. D. sits

This provider among specialist peers

Across the 4,869 specialist providers who report both Medicare Part D prescribing and a MIPS quality score, Paul Harasimowicz, M. D. writes more Part D claims than 46% of them and scores higher on MIPS quality than 14% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Part D claim volume vs MIPS quality, by specialty percentile

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality0255075100024.148.372.496.6Part D claim volume, percentile in specialtyMIPS quality, percentilePart D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 45Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 28Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 90Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 28Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 22Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 20Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 83Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 82Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 68Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 80Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 65Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 55Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 72Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 18Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 0Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 60Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 42Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 73Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 28Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 47Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 58Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 5Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 17Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 27Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 70Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 8Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 15Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 48Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 12Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 88Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 52Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 43Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 78Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 40Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 50Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 53Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 63Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 7Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 28Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 28Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 28Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 85Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 23Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 92Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 67Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 87Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 28Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 75Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 77Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 57Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 25Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 13Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 62Paul Harasimowicz, M. D.-Part D claim volume, percentile in specialty: 46 · MIPS quality, percentile: 14
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one specialist peer from a representative sample of 60; the gold marker is Paul Harasimowicz, M. D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

What does the federal data show about Paul Harasimowicz, M. D.?

Below national average

NPI registry status

Active

Issued 08/24/2005

NPI 1538152574

Primary specialty

Specialist

High-volume

69,608 US NPIs in this specialty

Medicare Part D claims

747 49% vs specialty avg

2023 prescription claims

Specialty avg: 1,474

MIPS final score

34/100 49.1 pts vs avg

Below average band

vs 83.1 national avg

Specialty distribution in Massachusetts

How Specialist compares to other specialties among Massachusetts providers

Massachusetts 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%Specialist - 0.6%Specialist0.6%
Largest specialties in Massachusetts (% of in-state providers)

Medicare quality performance, MIPS

Paul Harasimowicz, M. D.'s 2023 MIPS final score plotted against the Specialist national average

Below national average
MIPS Final Score
34/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Specialist) - 34/100 vs national avg 83.1

0%100%National avg83%34%
MIPS final score (Specialist) - 34/100 vs national avg 83.1
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).

Paul Harasimowicz, M. D. appears in the CMS NPPES registry as a Specialist provider holding M. D. credentials at 190 GROTON RD, Ayer, MA, 01432, with a listed phone of (978) 772-9846. NPI 1538152574 was issued on 08/24/2005.

Medicare Part D records for calendar year 2023 show 747 prescription claims written by this provider, covering 125 Medicare beneficiaries and totaling roughly $28K in drug spend, split 7% brand-name and 93% generic by claim count, with an opioid prescribing rate of 70.1%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 34/100 for the 2023 performance year (Quality 22.5, Cost 76.7), compared with the national average of 83.1.

Specialist is a high-volume specialty nationwide, with 69,608 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

190 GROTON RD
Ayer, MA 01432

Provider Details

NPI 1538152574
Specialty Specialist
Credentials M. D.
Gender Male
NPI Issued 08/24/2005

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

33.965
Final Score
Avg: 83.1
22.4839
Quality
76.727
Cost

Reporting: Individual

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 Paul Harasimowicz, M. D.. Source: openpaymentsdata.cms.gov.

Total received

$3.5K

Largest payer

RxSight Inc

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.

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 Paul Harasimowicz, M. D.. To verify Paul Harasimowicz, 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 · Generic-heavy

Paul Harasimowicz, M. D. - brand share 7.0%
Specialist average

7% brand-name claims vs 93% generic, on 747 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.

747
Total Claims
$28K
Total Drug Cost
125
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
761
Total Day Supply
11,279
Brand vs Generic
7% brand / 93% generic
Brand Drug Cost
$21K
Generic Drug Cost
$7K
Opioid Claims
524 (70.1% rate)
Antibiotic Claims
98

Patient Demographics

Average Patient Age
71.7 years
Avg HCC Risk Score
1.21
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 Paul Harasimowicz, 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
Oxycodone Hcl
194
Tramadol Hcl
134
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
88
Amoxicillin
59
Gabapentin
47
Oxycontin
Oxycodone Hcl
41
Oxycodone-Acetaminophen
Oxycodone Hcl/Acetaminophen
39
Diclofenac Sodium
30
Clindamycin Hcl
27
Acetaminophen-Codeine
Acetaminophen With Codeine
19

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

Specialist Overview

How Paul Harasimowicz, M. D. fits within the Specialist landscape nationally.

69,608
Specialist Providers in US
55
States with Specialist
1,474
Avg Claims per Provider

Paul Harasimowicz, M. D.'s 747 claims are below the specialty average of 1,474.

Nearby Specialist Providers in Massachusetts

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

Compare Specialist 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 Specialist 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 Paul Harasimowicz, M. D.'s specialty?
Paul Harasimowicz, M. D. specializes in Specialist and practices in Ayer, Massachusetts. Credentials: M. D..
How much does Paul Harasimowicz, M. D. prescribe under Medicare Part D?
In 2023, Paul Harasimowicz, M. D. wrote 747 Medicare Part D claims totaling $28K in drug costs for 125 beneficiaries.
What is Paul Harasimowicz, M. D.'s Medicare quality score?
Paul Harasimowicz, M. D. has a CMS MIPS Final Score of 34/100 (Quality: 22.5, Cost: 76.7). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Paul Harasimowicz, M. D. located?
Paul Harasimowicz, M. D. is located at 190 GROTON RD, Ayer, MA, 01432. Phone: (978) 772-9846.
What is Paul Harasimowicz, M. D.'s NPI number?
Paul Harasimowicz, M. D.'s National Provider Identifier (NPI) is 1538152574, issued on 08/24/2005.
Does Paul Harasimowicz, M. D. prescribe more brand-name or generic drugs?
Paul Harasimowicz, M. D.'s prescribing is 7% brand-name and 93% generic drugs by claim count, with $21K in brand drug costs.
Does Paul Harasimowicz, M. D. prescribe opioids?
Yes, Paul Harasimowicz, M. D. had 524 opioid claims in 2023 with an opioid prescribing rate of 70.1%.
How many Specialist providers are there in the US?
There are 69,608 Specialist providers across 55 states in the US. The average Specialist provider writes 1,474 Medicare Part D claims per year.
What drugs does Paul Harasimowicz, M. D. prescribe most often?
Based on 2023 Medicare Part D data, Paul Harasimowicz, M. D.'s most frequently prescribed drugs include Oxycodone Hcl, Tramadol Hcl, Hydrocodone-Acetaminophen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Paul Harasimowicz, M. D. accept Medicare?
Paul Harasimowicz, M. D. appears in CMS Medicare data with 747 Part D claims and 125 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Paul Harasimowicz, M. D.'s credentials?
Paul Harasimowicz, M. D.'s NPI is 1538152574 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

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 (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
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.

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 May 2026.