2026 NPPES data Physician Assistant NPI 1366074122 PA-C
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HEATHER CLARKE, PA-C

Physician Assistant in EASTHAMPTON, Massachusetts. 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
3K
Medicare Part D claims · 331 beneficiaries · Physician Assistant avg: 790
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

HEATHER CLARKE, PA-C filed 2,640 Medicare Part D claims in 2023 as a Physician Assistant in EASTHAMPTON, Massachusetts, prescribing 88% generic.

3K
Part D claims, 2023
88%
generic prescribing

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.

HEATHER CLARKE, PA-C's Medicare Part D volume vs every U.S. prescriber

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

2,640 Top 13% higher than 87% 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%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. 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

What does the federal data show about HEATHER CLARKE, PA-C?

Quality data not reported

NPI registry status

Active

Issued 02/10/2020

NPI 1366074122

Primary specialty

Physician Assistant

High-volume

149,975 US NPIs in this specialty

Medicare Part D claims

2,640 234% vs specialty avg

2023 prescription claims

Specialty avg: 790

Specialty distribution in Massachusetts

How Physician Assistant compares to other specialties among Massachusetts providers

Massachusetts providers

Physician Assistant share within Massachusetts

1. Physician Assistant42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Physician Assistant share within Massachusetts

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Physician Assistant) — 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).

HEATHER CLARKE, PA-C appears in the CMS NPPES registry as a Physician Assistant provider holding PA-C credentials at 238 NORTHAMPTON ST, EASTHAMPTON, MA, 01027, with a listed phone of (413) 529-9300. NPI 1366074122 was issued on 02/10/2020. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CLARKE 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 2,640 prescription claims written by this provider, covering 331 Medicare beneficiaries and totaling roughly $252K in drug spend, split 12% brand-name and 88% generic by claim count, with an opioid prescribing rate of 10.7%. 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.

Physician Assistant is a high-volume specialty nationwide, with 149,975 enrolled providers across 56 states and an average of 790 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

238 NORTHAMPTON ST
EASTHAMPTON, MA 01027

Provider Details

NPI 1366074122
Specialty Physician Assistant
Credentials PA-C
Gender Female
NPI Issued 02/10/2020

Hospital and facility affiliations

Facilities where HEATHER CLARKE, PA-C 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.

ON CALL URGENT CARE, LLC
INDIAN ORCHARD, MA
VALLEY MEDICAL GROUP PC
EASTHAMPTON, 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 HEATHER CLARKE, PA-C. To verify HEATHER CLARKE, PA-C'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

HEATHER CLARKE, PA-C — brand share 12.0%
Specialty average (est.)

12% brand-name claims vs 88% generic, on 2,640 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.

2,640
Total Claims
$252K
Total Drug Cost
331
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
4,822
Total Day Supply
134,226
Brand vs Generic
12% brand / 88% generic
Brand Drug Cost
$184K
Generic Drug Cost
$67K
Opioid Claims
282 (10.7% rate)
Antibiotic Claims
72

Patient Demographics

Average Patient Age
65.4 years
Avg HCC Risk Score
1.24
Gender Split
62% female / 38% male
Age Distribution
<65: 121, 65-74: 124, 75-84: 69, 85+: 17

Top Prescribed Drugs (Medicare Part D)

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

What HEATHER CLARKE, PA-C 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
120
Atorvastatin Calcium
117
Buprenorphine-Naloxone
Buprenorphine Hcl/Naloxone Hcl
109
Gabapentin
105
Lisinopril
96
Eliquis
Apixaban
70
Omeprazole
60
Levothyroxine Sodium
54
Hydrochlorothiazide
53
Oxycodone-Acetaminophen
Oxycodone Hcl/Acetaminophen
50

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

Physician Assistant Overview

How HEATHER CLARKE, PA-C fits within the Physician Assistant landscape nationally.

149,975
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider

HEATHER CLARKE, PA-C's 2,640 claims are above the specialty average of 790.

Nearby Physician Assistant Providers in Massachusetts

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

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

Frequently Asked Questions

What is HEATHER CLARKE, PA-C's specialty?
HEATHER CLARKE, PA-C specializes in Physician Assistant and practices in EASTHAMPTON, Massachusetts. Credentials: PA-C.
How much does HEATHER CLARKE, PA-C prescribe under Medicare Part D?
In 2023, HEATHER CLARKE, PA-C wrote 2,640 Medicare Part D claims totaling $252K in drug costs for 331 beneficiaries.
Where is HEATHER CLARKE, PA-C located?
HEATHER CLARKE, PA-C is located at 238 NORTHAMPTON ST, EASTHAMPTON, MA, 01027. Phone: (413) 529-9300.
What is HEATHER CLARKE, PA-C's NPI number?
HEATHER CLARKE, PA-C's National Provider Identifier (NPI) is 1366074122, issued on 02/10/2020.
Does HEATHER CLARKE, PA-C prescribe more brand-name or generic drugs?
HEATHER CLARKE, PA-C's prescribing is 12% brand-name and 88% generic drugs by claim count, with $184K in brand drug costs.
Does HEATHER CLARKE, PA-C prescribe opioids?
Yes, HEATHER CLARKE, PA-C had 282 opioid claims in 2023 with an opioid prescribing rate of 10.7%.
How many Physician Assistant providers are there in the US?
There are 149,975 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
What drugs does HEATHER CLARKE, PA-C prescribe most often?
Based on 2023 Medicare Part D data, HEATHER CLARKE, PA-C's most frequently prescribed drugs include Oxycodone Hcl, Atorvastatin Calcium, Buprenorphine-Naloxone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does HEATHER CLARKE, PA-C accept Medicare?
HEATHER CLARKE, PA-C appears in CMS Medicare data with 2,640 Part D claims and 331 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify HEATHER CLARKE, PA-C's credentials?
HEATHER CLARKE, PA-C's NPI is 1366074122 with credentials PA-C. 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