2026 NPPES data Internal Medicine Physician NPI 1275527319 M.D.
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JEFFREY GINDORF, M.D.

Internal Medicine Physician in ALGONQUIN, Illinois. 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
4K
Medicare Part D claims · 332 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$21.45
1 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

JEFFREY GINDORF, M.D. filed 3,506 Medicare Part D claims in 2023 as a Internal Medicine Physician in ALGONQUIN, Illinois, prescribing 88% generic.

4K
Part D claims, 2023
88%
generic prescribing
$21.45
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.

JEFFREY GINDORF, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

3,506 Top 10% higher than 90% 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%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. 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

Board-eligible specialty (heuristic — not verified)

JEFFREY GINDORF, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about JEFFREY GINDORF, M.D.?

Quality data not reported

NPI registry status

Active

Issued 09/06/2005

NPI 1275527319

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

3,506 29% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Illinois

How Internal Medicine Physician compares to other specialties among Illinois providers

Illinois providers

Internal Medicine Physician share within Illinois

1. Internal Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Internal Medicine Physician share within Illinois

Specialty board-certification context

Estimated specialty board-certified rate — Internal Medicine Physician (ABMS / AOA reference)

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

Est. board-certified rate (Internal Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Internal Medicine Physician) — 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).

JEFFREY GINDORF, M.D. is a Internal Medicine Physician provider practicing in ALGONQUIN, Illinois, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1275527319. 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.

JEFFREY GINDORF, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 600 S RANDALL RD, ALGONQUIN, IL, 60102, with a listed phone of (847) 658-4793. NPI 1275527319 was issued on 09/06/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GINDORF 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 3,506 prescription claims written by this provider, covering 332 Medicare beneficiaries and totaling roughly $374K in drug spend, split 12% brand-name and 88% generic by claim count, with an opioid prescribing rate of 1.3%. 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.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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

600 S RANDALL RD
ALGONQUIN, IL 60102

Provider Details

NPI 1275527319
Specialty Internal Medicine Physician
Credentials M.D.
Gender Male
NPI Issued 09/06/2005

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 JEFFREY GINDORF, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$21

Largest payer

Abbott Laboratories

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 — Illinois IDFPR 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 ~42K Illinois medical licensees in 2023 — they are NOT specific to JEFFREY GINDORF, M.D.. To verify JEFFREY GINDORF, M.D.'s current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases

IDFPR 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 Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Typical

JEFFREY GINDORF, M.D. — brand share 12.0%
Specialty average (est.)

12% brand-name claims vs 88% generic, on 3,506 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.

3,506
Total Claims
$374K
Total Drug Cost
332
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
8,685
Total Day Supply
252,789
Brand vs Generic
12% brand / 88% generic
Brand Drug Cost
$305K
Generic Drug Cost
$68K
Opioid Claims
44 (1.3% rate)
Antibiotic Claims
134

Patient Demographics

Average Patient Age
74.4 years
Avg HCC Risk Score
0.94
Gender Split
46% female / 54% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Atorvastatin Calcium
337
Amlodipine Besylate
176
Losartan Potassium
172
Metoprolol Succinate
170
Levothyroxine Sodium
146
Metformin Hcl
101
Lisinopril
99
Omeprazole
73
Simvastatin
72
Hydrochlorothiazide
71

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

Internal Medicine Physician Overview

How JEFFREY GINDORF, M.D. fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

JEFFREY GINDORF, M.D.'s 3,506 claims are above the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Illinois

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

Compare Internal Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is JEFFREY GINDORF, M.D.'s specialty?
JEFFREY GINDORF, M.D. specializes in Internal Medicine Physician and practices in ALGONQUIN, Illinois. Credentials: M.D..
How much does JEFFREY GINDORF, M.D. prescribe under Medicare Part D?
In 2023, JEFFREY GINDORF, M.D. wrote 3,506 Medicare Part D claims totaling $374K in drug costs for 332 beneficiaries.
Where is JEFFREY GINDORF, M.D. located?
JEFFREY GINDORF, M.D. is located at 600 S RANDALL RD, ALGONQUIN, IL, 60102. Phone: (847) 658-4793.
What is JEFFREY GINDORF, M.D.'s NPI number?
JEFFREY GINDORF, M.D.'s National Provider Identifier (NPI) is 1275527319, issued on 09/06/2005.
Does JEFFREY GINDORF, M.D. prescribe more brand-name or generic drugs?
JEFFREY GINDORF, M.D.'s prescribing is 12% brand-name and 88% generic drugs by claim count, with $305K in brand drug costs.
Does JEFFREY GINDORF, M.D. prescribe opioids?
Yes, JEFFREY GINDORF, M.D. had 44 opioid claims in 2023 with an opioid prescribing rate of 1.3%.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does JEFFREY GINDORF, M.D. prescribe most often?
Based on 2023 Medicare Part D data, JEFFREY GINDORF, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does JEFFREY GINDORF, M.D. accept Medicare?
JEFFREY GINDORF, M.D. appears in CMS Medicare data with 3,506 Part D claims and 332 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify JEFFREY GINDORF, M.D.'s credentials?
JEFFREY GINDORF, M.D.'s NPI is 1275527319 with credentials M.D.. 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