2026 NPPES data Medical Physician Assistant NPI 1689689523 PA-C
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WILLIAM GRABOWSKI, PA-C

Medical Physician Assistant in SAVANNAH, Georgia. 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
2K
Medicare Part D claims · 307 beneficiaries · Medical Physician Assistant avg: 1K
Generic prescribing
93%
generic claims · 7% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$539.67
26 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

WILLIAM GRABOWSKI, PA-C filed 1,962 Medicare Part D claims in 2023 as a Medical Physician Assistant in SAVANNAH, Georgia, prescribing 93% generic.

2K
Part D claims, 2023
93%
generic prescribing
$539.67
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.

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

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

1,962 Top 16% higher than 84% 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%). This entry sits in this band. 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 WILLIAM GRABOWSKI, PA-C?

Quality data not reported

NPI registry status

Active

Issued 07/29/2006

NPI 1689689523

Primary specialty

Medical Physician Assistant

Mid-sized

40,527 US NPIs in this specialty

Medicare Part D claims

1,962 82% vs specialty avg

2023 prescription claims

Specialty avg: 1,077

Specialty distribution in Georgia

How Medical Physician Assistant compares to other specialties among Georgia providers

Georgia providers

Medical Physician Assistant share within Georgia

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

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).

WILLIAM GRABOWSKI, PA-C appears in the CMS NPPES registry as a Medical Physician Assistant provider holding PA-C credentials at 8 WHEELER ST, SAVANNAH, GA, 31405, with a listed phone of (912) 352-4340. NPI 1689689523 was issued on 07/29/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GRABOWSKI 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 1,962 prescription claims written by this provider, covering 307 Medicare beneficiaries and totaling roughly $131K in drug spend, split 7% brand-name and 93% generic by claim count, with an opioid prescribing rate of 10.6%. 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

8 WHEELER ST
SAVANNAH, GA 31405

Provider Details

NPI 1689689523
Specialty Medical Physician Assistant
Credentials PA-C
Gender Male
NPI Issued 07/29/2006

Hospital and facility affiliations

Facilities where WILLIAM GRABOWSKI, 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.

SAVANNAH PAIN MANAGEMENT, INC.
SAVANNAH, GA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

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 WILLIAM GRABOWSKI, PA-C. Source: openpaymentsdata.cms.gov.

Total received

$540

Largest payer

Collegium Pharmaceutical, 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.

Brand vs generic prescribing mix · Generic-heavy

WILLIAM GRABOWSKI, PA-C — brand share 7.0%
Specialty average (est.)

7% brand-name claims vs 93% generic, on 1,962 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.

1,962
Total Claims
$131K
Total Drug Cost
307
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,180
Total Day Supply
60,669
Brand vs Generic
7% brand / 93% generic
Brand Drug Cost
$86K
Generic Drug Cost
$45K
Opioid Claims
208 (10.6% rate)

Patient Demographics

Average Patient Age
68.1 years
Avg HCC Risk Score
1.31
Gender Split
57% female / 43% male
Age Distribution
<65: 89, 65-74: 145, 75-84: 60, 85+: 13

Top Prescribed Drugs (Medicare Part D)

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

What WILLIAM GRABOWSKI, 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
Gabapentin
355
Tizanidine Hcl
186
Baclofen
139
Pregabalin
124
Tramadol Hcl
121
Cyclobenzaprine Hcl
113
Duloxetine Hcl
90
Zolpidem Tartrate
88
Diclofenac Sodium
86
Lidocaine
50

* 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 WILLIAM GRABOWSKI, PA-C 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

WILLIAM GRABOWSKI, PA-C's 1,962 claims are above the specialty average of 1,077.

Nearby Medical Physician Assistant Providers in Georgia

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

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

Frequently Asked Questions

What is WILLIAM GRABOWSKI, PA-C's specialty?
WILLIAM GRABOWSKI, PA-C specializes in Medical Physician Assistant and practices in SAVANNAH, Georgia. Credentials: PA-C.
How much does WILLIAM GRABOWSKI, PA-C prescribe under Medicare Part D?
In 2023, WILLIAM GRABOWSKI, PA-C wrote 1,962 Medicare Part D claims totaling $131K in drug costs for 307 beneficiaries.
Where is WILLIAM GRABOWSKI, PA-C located?
WILLIAM GRABOWSKI, PA-C is located at 8 WHEELER ST, SAVANNAH, GA, 31405. Phone: (912) 352-4340.
What is WILLIAM GRABOWSKI, PA-C's NPI number?
WILLIAM GRABOWSKI, PA-C's National Provider Identifier (NPI) is 1689689523, issued on 07/29/2006.
Does WILLIAM GRABOWSKI, PA-C prescribe more brand-name or generic drugs?
WILLIAM GRABOWSKI, PA-C's prescribing is 7% brand-name and 93% generic drugs by claim count, with $86K in brand drug costs.
Does WILLIAM GRABOWSKI, PA-C prescribe opioids?
Yes, WILLIAM GRABOWSKI, PA-C had 208 opioid claims in 2023 with an opioid prescribing rate of 10.6%.
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 WILLIAM GRABOWSKI, PA-C prescribe most often?
Based on 2023 Medicare Part D data, WILLIAM GRABOWSKI, PA-C's most frequently prescribed drugs include Gabapentin, Tizanidine Hcl, Baclofen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does WILLIAM GRABOWSKI, PA-C accept Medicare?
WILLIAM GRABOWSKI, PA-C appears in CMS Medicare data with 1,962 Part D claims and 307 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify WILLIAM GRABOWSKI, PA-C's credentials?
WILLIAM GRABOWSKI, PA-C's NPI is 1689689523 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