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2026 NPPES data Geriatric Medicine (Family Medicine) Physician NPI 1659362200 MD
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Herbert Acker, MD

Geriatric Medicine (Family Medicine) Physician in Fort Wayne, Indiana.

This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,792 in Geriatric Medicine (Family Medicine) Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.

Federal data, no proprietary rating. We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
267
Medicare Part D claims · 77 beneficiaries · Geriatric Medicine (Family Medicine) Physician avg: 5K
MIPS score
88/100
▲ 4 pts above national avg 83.5 · Above neutral
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Compiled from official public sources by the editorial process.

What the federal data shows

Herbert Acker, MD reported a CMS MIPS final score of 88/100 - above the 83.5 national average - and filed 267 Medicare Part D claims in 2024.

88/100
MIPS score · +4 vs avg
267
Part D claims, 2024
Likely
board-certified (heuristic)
≥52nd
pct among measured MIPS (lower-bound band)

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.

Federal trust snapshot

What official records show about Herbert Acker, MD

Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.

  • Verified

    NPI registry status

    Active listing in the CMS National Provider Identifier Registry (NPI 1659362200), first enumerated 11/02/2005.

    Source: CMS NPPES

  • Reported

    Medicare Part D participation

    Filed 267 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.

    Source: CMS Part D Prescriber PUF

  • Reported

    CMS quality reporting (MIPS)

    Reported a CMS MIPS final score of 88/100 in the Quality Payment Program — a federal quality measure, not a patient review.

    Source: CMS Quality Payment Program

  • Reported

    Board certification signal

    Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.

    Source: NUCC taxonomy + CMS participation heuristic

  • Not in federal data

    Individual sanction lookup

    PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.

    Source: State medical board / FSMB

This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.

CMS NPPES provider registry desk

NPI 1659362200 · Geriatric Medicine (Family Medicine) Physician

NPI-10 · ENUM-LEGACY · TAX-NARROW · MIPS-ABOVE · RX-LIGHT · BOOK-THIN · PHOTO-FINISH

  • NPI-10 1659362200
  • ENUM-LEGACY 2005
  • TAX-NARROW 1,792
  • MIPS-ABOVE 88/100
  • RX-LIGHT 267
  • BOOK-THIN 20 in Indiana
  • PHOTO-FINISH Lobna Ali · ±0.1

MIPS final-score neighbourhood

Same-specialty nationwide peers by CMS final score, not geographic proximity

MIPS pts

What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).

Source CMS Quality Payment Program (MIPS) As of 2023

Herbert Acker, MD's MIPS score vs every measured U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.

88 ≥ 52nd percentile 52% of 454,083 measured providers are in lower value bands

0–10: 8,684 measured providers (2%). Below this entry. 10–20: 3,008 measured providers (1%). Below this entry. 20–30: 3,069 measured providers (1%). Below this entry. 30–40: 2,746 measured providers (1%). Below this entry. 40–50: 2,928 measured providers (1%). Below this entry. 50–60: 5,882 measured providers (1%). Below this entry. 60–70: 13,906 measured providers (3%). Below this entry. 70–80: 94,570 measured providers (21%). Below this entry. 80–90: 129,887 measured providers (29%). This entry sits in this band. 90+: 189,403 measured providers (42%). Above this entry. This provider 0 100 every measured MIPS clinician, bucketed by value

Each bar is a band; taller bars hold more measured providers. 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.

The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Where Herbert Acker, MD sits

This provider among geriatric medicine (family medicine) physician peers

Across the 278 geriatric medicine (family medicine) physician providers who report both Medicare Part D prescribing and a MIPS quality score, Herbert Acker, MD writes more Part D claims than 12% of them and scores higher on MIPS quality than 58% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality02550751000255075100Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 3Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 98Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 98Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 82Herbert Acker, MD, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 58
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one geriatric medicine (family medicine) physician peer from a representative sample of 60; the gold marker is Herbert Acker, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

Herbert Acker, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about Herbert Acker, MD?

High performer (top quartile)

NPI registry status

Active

Issued 11/02/2005

NPI 1659362200

Primary specialty

Geriatric Medicine (Family Medicine) Physician

Niche

1,792 US NPIs in this specialty

Medicare Part D claims

267 95% vs specialty avg

2024 prescription claims

Specialty avg: 4,917

MIPS final score

88/100 4.5 pts vs avg

Above neutral band

vs 83.5 national avg

Specialty distribution in Indiana

How Geriatric Medicine (Family Medicine) Physician compares to other specialties among Indiana providers

Indiana providers
Behavior Technician14.3%Student in an Organized Heal…4.8%Pharmacist4.3%Clinical Social Worker4.2%Family Nurse Practitioner4.2%Mental Health Counselor4.1%Geriatric Medicine (Family M…0%
Largest specialties in Indiana (% of in-state providers)

Medicare quality performance, MIPS

Herbert Acker, MD's 2023 MIPS final score plotted against the Geriatric Medicine (Family Medicine) Physician national average

High performer (top quartile)
MIPS Final Score
88/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%88%
MIPS final score (Geriatric Medicine (Family Medicine) Physician) - 88/100 vs national avg 83.5
How MIPS and board certification work

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).

Practice Address

3534 BROOKLYN AVE
Fort Wayne, IN 46809
(260) 478-5100

Provider Details

NPI 1659362200
Specialty Geriatric Medicine (Family Medicine) Physician
Credentials MD
Gender Male
NPI Issued 11/02/2005

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

87.9565
Final Score
Measured-score avg: 83.5
74.048
Quality
100
Promoting Interoperability

Reporting: Alternative Payment Model

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2024.

267
Total Claims
$14K
Total Drug Cost
77
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
559
Total Day Supply
16,604
Generic Drug Cost
$3K

Patient Demographics

Average Patient Age
77.3 years
Avg HCC Risk Score
1.21
Gender Split
47% female / 53% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.

What Herbert Acker, MD prescribes most

Top Medicare Part D drugs by claim count, 2024

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2024
Drug Claims
Hydrochlorothiazide
 31
Atorvastatin Calcium
 28
Amlodipine Besylate
 26
Lisinopril
 13
Meloxicam
 13
Metoprolol Succinate
 13
Metoprolol Tartrate
 12

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

More Geriatric Medicine (Family Medicine) Physician in IN → All providers in Indiana → Compare specialties →

Geriatric Medicine (Family Medicine) Physician Overview

How Herbert Acker, MD fits within the Geriatric Medicine (Family Medicine) Physician landscape nationally.

1,792
Geriatric Medicine (Family Medicine) Physician Providers in US
52
States with Geriatric Medicine (Family Medicine) Physician
4,917
Avg Claims per Provider

Herbert Acker, MD's 267 claims are below the specialty average of 4,917.

Nationwide Geriatric Medicine (Family Medicine) Physician peers with similar MIPS or enrollment year

Two federal-record peer sets for Acker, both outside Indiana so the neighborhoods are not geographic containment.

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (88 here).

Lobna Ali 88.1 LA Juliana Wilking-Johnson 88.2 CO Suzanne Staudinger 88.4 WA Anne Giesen 87.5 CO

Same NPPES enumeration year (2005)

Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.

David Owens Kingston, PA Timothy Kaiser Burlington, MA Kevin Gil Rockville, MD John Stoukides East Providence, RI

Nearby Geriatric Medicine (Family Medicine) Physician Providers in Indiana

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

One of 20 Geriatric Medicine (Family Medicine) Physician providers enrolled in Indiana, 5 are shown here.

Sarah Adrian-Stephenson
NP
Avon, IN
Dr. Thomas Alley
M.D.
Indianapolis, IN
Dr. Jack Bartoszek
D.O.
Mishawaka, IN
Dr. James Buchanan
MD
Auburn, IN
Dr. Bruce Burton
MD
Corydon, IN

Compare Geriatric Medicine (Family Medicine) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is Herbert Acker, MD's specialty? ▼
Herbert Acker, MD specializes in Geriatric Medicine (Family Medicine) Physician and practices in Fort Wayne, Indiana. Credentials: MD.
How much does Herbert Acker, MD prescribe under Medicare Part D? ▼
In 2024, Herbert Acker, MD wrote 267 Medicare Part D claims totaling $14K in drug costs for 77 beneficiaries.
What is Herbert Acker, MD's Medicare quality score? ▼
Herbert Acker, MD has a CMS MIPS Final Score of 88/100 (Quality: 74). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Herbert Acker, MD located? ▼
Herbert Acker, MD is located at 3534 BROOKLYN AVE, Fort Wayne, IN, 46809. Phone: (260) 478-5100.
What is Herbert Acker, MD's NPI number? ▼
Herbert Acker, MD's National Provider Identifier (NPI) is 1659362200, issued on 11/02/2005.
How many Geriatric Medicine (Family Medicine) Physician providers are there in the US? ▼
There are 1,792 Geriatric Medicine (Family Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Family Medicine) Physician provider writes 4,917 Medicare Part D claims per year.
What drugs does Herbert Acker, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Herbert Acker, MD's most frequently prescribed drugs include Hydrochlorothiazide, Atorvastatin Calcium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Herbert Acker, MD accept Medicare? ▼
Herbert Acker, MD appears in CMS Medicare data with 267 Part D claims and 77 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Herbert Acker, MD's credentials? ▼
Herbert Acker, MD's NPI is 1659362200 with credentials MD. 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

View source datasets and methodology notes
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 (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
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 August 2026 (NPPES) / 2024 (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

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.