2026 NPPES data Surgical Physician Assistant NPI 1558486985 PA-C
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STEPHANIE PENA, PA-C

Surgical Physician Assistant in NATICK, 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
1K
Medicare Part D claims · 291 beneficiaries · Surgical Physician Assistant avg: 316
Generic prescribing
79%
generic claims · 21% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$557.05
22 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: STEPHANIE PENA, PA-C is a Surgical Physician Assistant ([object Object]) practicing in NATICK, Massachusetts with a Medicare Part D prescribing footprint of 1K claims across 291 beneficiaries — 21% brand-name prescribing . Industry payments of $557.05 across 22 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: STEPHANIE PENA, PA-C filed 1,321 Medicare Part D claims in 2023 across NATICK, Massachusetts. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

STEPHANIE PENA, PA-C at a glance

Quality data not reported

NPI registry status

Active

Issued 03/21/2007

NPI 1558486985

Primary specialty

Surgical Physician Assistant

Mid-sized

16,119 US NPIs in this specialty

Medicare Part D claims

1,321 318% vs specialty avg

2023 prescription claims

Specialty avg: 316

Specialty distribution in Massachusetts

How Surgical Physician Assistant compares to other specialties among Massachusetts providers

Massachusetts providers

Surgical Physician Assistant share within Massachusetts

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

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Surgical 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).

STEPHANIE PENA, PA-C is a Surgical Physician Assistant provider practicing in NATICK, Massachusetts, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: PA-C. NPI: 1558486985. 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.

STEPHANIE PENA, PA-C appears in the CMS NPPES registry as a Surgical Physician Assistant provider holding PA-C credentials at 67 UNION STREET, NATICK, MA, 01760, with a listed phone of (508) 655-4422. NPI 1558486985 was issued on 03/21/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what PENA 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 1,321 prescription claims written by this provider, covering 291 Medicare beneficiaries and totaling roughly $584K in drug spend, split 21% brand-name and 79% 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.

Surgical Physician Assistant is a mid-sized specialty nationwide, with 16,119 enrolled providers across 54 states and an average of 316 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

67 UNION STREET
NATICK, MA 01760

Provider Details

NPI 1558486985
Specialty Surgical Physician Assistant
Credentials PA-C
Gender Female
NPI Issued 03/21/2007

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 STEPHANIE PENA, PA-C. Source: openpaymentsdata.cms.gov.

Total received

$557

Largest payer

Endo USA, 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 STEPHANIE PENA, PA-C. To verify STEPHANIE PENA, 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

STEPHANIE PENA, PA-C — brand share 21.0%
Specialty average (est.)

21% brand-name claims vs 79% generic, on 1,321 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.

1,321
Total Claims
$584K
Total Drug Cost
291
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,449
Total Day Supply
70,509
Brand vs Generic
21% brand / 79% generic
Brand Drug Cost
$532K
Generic Drug Cost
$52K
Antibiotic Claims
155

Patient Demographics

Average Patient Age
75.7 years
Avg HCC Risk Score
1.41
Gender Split
27% female / 73% male
Age Distribution
<65: 21, 65-74: 110, 75-84: 114, 85+: 46

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
211
Oxybutynin Chloride Er
Oxybutynin Chloride
150
Myrbetriq
Mirabegron
141
Testosterone
106
Finasteride
91
Alfuzosin Hcl Er
Alfuzosin Hcl
81
Testosterone Cypionate
62
Nitrofurantoin
Nitrofurantoin Macrocrystal
43
Nitrofurantoin Mono-Macro
Nitrofurantoin Monohyd/M-Cryst
42
Methenamine Hippurate
35

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

Surgical Physician Assistant Overview

How STEPHANIE PENA, PA-C fits within the Surgical Physician Assistant landscape nationally.

16,119
Surgical Physician Assistant Providers in US
54
States with Surgical Physician Assistant
316
Avg Claims per Provider

STEPHANIE PENA, PA-C's 1,321 claims are above the specialty average of 316.

Nearby Surgical Physician Assistant Providers in Massachusetts

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

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

Frequently Asked Questions

What is STEPHANIE PENA, PA-C's specialty?
STEPHANIE PENA, PA-C specializes in Surgical Physician Assistant and practices in NATICK, Massachusetts. Credentials: PA-C.
How much does STEPHANIE PENA, PA-C prescribe under Medicare Part D?
In 2023, STEPHANIE PENA, PA-C wrote 1,321 Medicare Part D claims totaling $584K in drug costs for 291 beneficiaries.
Where is STEPHANIE PENA, PA-C located?
STEPHANIE PENA, PA-C is located at 67 UNION STREET, NATICK, MA, 01760. Phone: (508) 655-4422.
What is STEPHANIE PENA, PA-C's NPI number?
STEPHANIE PENA, PA-C's National Provider Identifier (NPI) is 1558486985, issued on 03/21/2007.
Does STEPHANIE PENA, PA-C prescribe more brand-name or generic drugs?
STEPHANIE PENA, PA-C's prescribing is 21% brand-name and 79% generic drugs by claim count, with $532K in brand drug costs.
How many Surgical Physician Assistant providers are there in the US?
There are 16,119 Surgical Physician Assistant providers across 54 states in the US. The average Surgical Physician Assistant provider writes 316 Medicare Part D claims per year.
What drugs does STEPHANIE PENA, PA-C prescribe most often?
Based on 2023 Medicare Part D data, STEPHANIE PENA, PA-C's most frequently prescribed drugs include Tamsulosin Hcl, Oxybutynin Chloride Er, Myrbetriq. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does STEPHANIE PENA, PA-C accept Medicare?
STEPHANIE PENA, PA-C appears in CMS Medicare data with 1,321 Part D claims and 291 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify STEPHANIE PENA, PA-C's credentials?
STEPHANIE PENA, PA-C's NPI is 1558486985 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