2026 NPPES data Physician Assistant NPI 1104368059 PA
Verify on CMS →

ANN GRUBB, PA

Physician Assistant in FORT WAYNE, Indiana. 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
770
Medicare Part D claims · 74 beneficiaries · Physician Assistant avg: 790
Generic prescribing
94%
generic claims · 6% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

ANN GRUBB, PA filed 770 Medicare Part D claims in 2023 as a Physician Assistant in FORT WAYNE, Indiana, prescribing 94% generic.

770
Part D claims, 2023
94%
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 GRUBB, PA's Medicare Part D volume vs every U.S. prescriber

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

770 Top 29% higher than 71% 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%). This entry sits in this band. 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 GRUBB, PA?

Quality data not reported

NPI registry status

Active

Issued 11/09/2016

NPI 1104368059

Primary specialty

Physician Assistant

High-volume

149,975 US NPIs in this specialty

Medicare Part D claims

770 3% vs specialty avg

2023 prescription claims

Specialty avg: 790

Specialty distribution in Indiana

How Physician Assistant compares to other specialties among Indiana providers

Indiana providers

Physician Assistant share within Indiana

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

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).

ANN GRUBB, PA appears in the CMS NPPES registry as a Physician Assistant provider holding PA credentials at 7916 W JEFFERSON BLVD, FORT WAYNE, IN, 46804, with a listed phone of (260) 432-2297. NPI 1104368059 was issued on 11/09/2016. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GRUBB 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 770 prescription claims written by this provider, covering 74 Medicare beneficiaries and totaling roughly $29K in drug spend, split 6% brand-name and 94% 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.

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

7916 W JEFFERSON BLVD
FORT WAYNE, IN 46804

Provider Details

NPI 1104368059
Specialty Physician Assistant
Credentials PA
Gender Female
NPI Issued 11/09/2016

Brand vs generic prescribing mix · Generic-heavy

ANN GRUBB, PA — brand share 6.0%
Specialty average (est.)

6% brand-name claims vs 94% generic, on 770 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.

770
Total Claims
$29K
Total Drug Cost
74
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
771
Total Day Supply
10,853
Brand vs Generic
6% brand / 94% generic
Brand Drug Cost
$13K
Generic Drug Cost
$16K
Antibiotic Claims
18

Patient Demographics

Average Patient Age
51.8 years
Avg HCC Risk Score
1.64

Top Prescribed Drugs (Medicare Part D)

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

What ANN GRUBB, PA 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
Hydroxyzine Pamoate
61
Trazodone Hcl
61
Buprenorphine-Naloxone
Buprenorphine Hcl/Naloxone Hcl
51
Gabapentin
48
Naloxone Hcl
38
Buspirone Hcl
27
Bupropion Xl
Bupropion Hcl
24
Quetiapine Fumarate
24
Naltrexone Hcl
23
Clonidine Hcl
17

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

Physician Assistant Overview

How ANN GRUBB, PA fits within the Physician Assistant landscape nationally.

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

ANN GRUBB, PA's 770 claims are below the specialty average of 790.

Nearby Physician Assistant Providers in Indiana

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

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

Frequently Asked Questions

What is ANN GRUBB, PA's specialty?
ANN GRUBB, PA specializes in Physician Assistant and practices in FORT WAYNE, Indiana. Credentials: PA.
How much does ANN GRUBB, PA prescribe under Medicare Part D?
In 2023, ANN GRUBB, PA wrote 770 Medicare Part D claims totaling $29K in drug costs for 74 beneficiaries.
Where is ANN GRUBB, PA located?
ANN GRUBB, PA is located at 7916 W JEFFERSON BLVD, FORT WAYNE, IN, 46804. Phone: (260) 432-2297.
What is ANN GRUBB, PA's NPI number?
ANN GRUBB, PA's National Provider Identifier (NPI) is 1104368059, issued on 11/09/2016.
Does ANN GRUBB, PA prescribe more brand-name or generic drugs?
ANN GRUBB, PA's prescribing is 6% brand-name and 94% generic drugs by claim count, with $13K in brand drug costs.
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 ANN GRUBB, PA prescribe most often?
Based on 2023 Medicare Part D data, ANN GRUBB, PA's most frequently prescribed drugs include Hydroxyzine Pamoate, Trazodone Hcl, Buprenorphine-Naloxone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does ANN GRUBB, PA accept Medicare?
ANN GRUBB, PA appears in CMS Medicare data with 770 Part D claims and 74 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify ANN GRUBB, PA's credentials?
ANN GRUBB, PA's NPI is 1104368059 with credentials PA. 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