2026 NPPES data Medical Physician Assistant NPI 1528233053 P.A.
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ANN ROHRBACH, P.A.

Medical Physician Assistant in SOMERSET, New Jersey. 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
567
Medicare Part D claims · 99 beneficiaries · Medical Physician Assistant avg: 1K
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

ANN ROHRBACH, P.A. filed 567 Medicare Part D claims in 2023 as a Medical Physician Assistant in SOMERSET, New Jersey, prescribing 86% generic.

567
Part D claims, 2023
86%
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.

ANN ROHRBACH, P.A.'s Medicare Part D volume vs every U.S. prescriber

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

567 Top 34% higher than 66% 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%). This entry sits in this band. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. 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 ANN ROHRBACH, P.A.?

Quality data not reported

NPI registry status

Active

Issued 04/25/2008

NPI 1528233053

Primary specialty

Medical Physician Assistant

Mid-sized

40,527 US NPIs in this specialty

Medicare Part D claims

567 47% vs specialty avg

2023 prescription claims

Specialty avg: 1,077

Specialty distribution in New Jersey

How Medical Physician Assistant compares to other specialties among New Jersey providers

New Jersey providers

Medical Physician Assistant share within New Jersey

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

Specialty board-certification context

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

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

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

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

ANN ROHRBACH, P.A. appears in the CMS NPPES registry as a Medical Physician Assistant provider holding P.A. credentials at 1303 STATE ROUTE 27, SOMERSET, NJ, 08873, with a listed phone of (732) 249-1500. NPI 1528233053 was issued on 04/25/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ROHRBACH 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 567 prescription claims written by this provider, covering 99 Medicare beneficiaries and totaling roughly $71K in drug spend, split 14% brand-name and 86% 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.

Medical Physician Assistant is a mid-sized specialty nationwide, with 40,527 enrolled providers across 55 states and an average of 1,077 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

1303 STATE ROUTE 27
SOMERSET, NJ 08873

Provider Details

NPI 1528233053
Specialty Medical Physician Assistant
Credentials P.A.
Gender Female
NPI Issued 04/25/2008

Brand vs generic prescribing mix · Typical

ANN ROHRBACH, P.A. — brand share 14.0%
Specialty average (est.)

14% brand-name claims vs 86% generic, on 567 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.

567
Total Claims
$71K
Total Drug Cost
99
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,222
Total Day Supply
35,903
Brand vs Generic
14% brand / 86% generic
Brand Drug Cost
$59K
Generic Drug Cost
$13K

Patient Demographics

Average Patient Age
75.5 years
Avg HCC Risk Score
1.84
Gender Split
55% female / 45% male
Age Distribution
<65: 11, 65-74: 36, 75-84: 28, 85+: 24

Top Prescribed Drugs (Medicare Part D)

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

What ANN ROHRBACH, P.A. 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
Atorvastatin Calcium
33
Metoprolol Succinate
27
Lisinopril
23
Liothyronine Sodium
22
Amlodipine Besylate
21
Famotidine
16
Rosuvastatin Calcium
15
Levocetirizine Dihydrochloride
14
Lovastatin
13
Spironolactone
11

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

Medical Physician Assistant Overview

How ANN ROHRBACH, P.A. fits within the Medical Physician Assistant landscape nationally.

40,527
Medical Physician Assistant Providers in US
55
States with Medical Physician Assistant
1,077
Avg Claims per Provider

ANN ROHRBACH, P.A.'s 567 claims are below the specialty average of 1,077.

Nearby Medical Physician Assistant Providers in New Jersey

Other clinicians with the same primary specialty enrolled in New Jersey, drawn from the same CMS NPPES roster as ROHRBACH.

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

Frequently Asked Questions

What is ANN ROHRBACH, P.A.'s specialty?
ANN ROHRBACH, P.A. specializes in Medical Physician Assistant and practices in SOMERSET, New Jersey. Credentials: P.A..
How much does ANN ROHRBACH, P.A. prescribe under Medicare Part D?
In 2023, ANN ROHRBACH, P.A. wrote 567 Medicare Part D claims totaling $71K in drug costs for 99 beneficiaries.
Where is ANN ROHRBACH, P.A. located?
ANN ROHRBACH, P.A. is located at 1303 STATE ROUTE 27, SOMERSET, NJ, 08873. Phone: (732) 249-1500.
What is ANN ROHRBACH, P.A.'s NPI number?
ANN ROHRBACH, P.A.'s National Provider Identifier (NPI) is 1528233053, issued on 04/25/2008.
Does ANN ROHRBACH, P.A. prescribe more brand-name or generic drugs?
ANN ROHRBACH, P.A.'s prescribing is 14% brand-name and 86% generic drugs by claim count, with $59K in brand drug costs.
How many Medical Physician Assistant providers are there in the US?
There are 40,527 Medical Physician Assistant providers across 55 states in the US. The average Medical Physician Assistant provider writes 1,077 Medicare Part D claims per year.
What drugs does ANN ROHRBACH, P.A. prescribe most often?
Based on 2023 Medicare Part D data, ANN ROHRBACH, P.A.'s most frequently prescribed drugs include Atorvastatin Calcium, Metoprolol Succinate, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ANN ROHRBACH, P.A. accept Medicare?
ANN ROHRBACH, P.A. appears in CMS Medicare data with 567 Part D claims and 99 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ANN ROHRBACH, P.A.'s credentials?
ANN ROHRBACH, P.A.'s NPI is 1528233053 with credentials P.A.. 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