2026 NPPES data Orthopaedic Trauma Physician NPI 1861475964 MD
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GREGORY FAHRENBACH, MD

Orthopaedic Trauma Physician in CHICAGO, 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
126
Medicare Part D claims · 63 beneficiaries · Orthopaedic Trauma Physician avg: 160
MIPS score
72.6842/100
▼ 10 pts below national avg 83.1 · [object Object]

What the federal data shows

GREGORY FAHRENBACH, MD reported a CMS MIPS final score of 72.6842/100 — below the 83.1 national average — and filed 126 Medicare Part D claims in 2023.

72.6842/100
MIPS score · -10 vs avg
126
Part D claims, 2023
Likely
board-certified (heuristic)

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.

GREGORY FAHRENBACH, MD's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

73 10th percentile higher than 10% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). This entry sits in this band. 80–90: 129,887 scored providers (27%). Above this entry. 90–100: 189,403 scored providers (40%). Above this entry. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored 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.

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

Board certification likely (heuristic — not verified)

GREGORY FAHRENBACH, 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 GREGORY FAHRENBACH, MD?

Below national average

NPI registry status

Active

Issued 11/22/2005

NPI 1861475964

Primary specialty

Orthopaedic Trauma Physician

Niche

715 US NPIs in this specialty

Medicare Part D claims

126 21% vs specialty avg

2023 prescription claims

Specialty avg: 160

MIPS final score

72.6842/100 10.41579999999999% pts

Mid-tier band

vs 83.1 national avg

Specialty distribution in Illinois

How Orthopaedic Trauma Physician compares to other specialties among Illinois providers

Illinois providers

Orthopaedic Trauma Physician share within Illinois

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

Medicare quality performance — MIPS

GREGORY FAHRENBACH, MD's 2023 MIPS final score plotted against the Orthopaedic Trauma Physician national average

Below national average
MIPS Final Score
72.6842/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Orthopaedic Trauma Physician) — 72.6842/100 vs national avg 83.1

0%100%National avg83%72.7%
MIPS final score (Orthopaedic Trauma Physician) — 72.6842/100 vs national avg 83.1

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).

GREGORY FAHRENBACH, MD appears in the CMS NPPES registry as a Orthopaedic Trauma Physician provider holding MD credentials at 7447 W TALCOTT AVE, CHICAGO, IL, 60631, with a listed phone of (773) 631-7898. NPI 1861475964 was issued on 11/22/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what FAHRENBACH 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 126 prescription claims written by this provider, covering 63 Medicare beneficiaries and totaling roughly $3K in drug spend. 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 72.6842/100 for the 2023 performance year (Quality 71.8158, Cost 52.965), compared with the national average of 83.1.

Orthopaedic Trauma Physician is a narrow specialty nationwide, with 715 enrolled providers across 51 states and an average of 160 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

7447 W TALCOTT AVE
CHICAGO, IL 60631

Provider Details

NPI 1861475964
Specialty Orthopaedic Trauma Physician
Credentials MD
Gender Male
NPI Issued 11/22/2005

CMS Quality Score (MIPS)

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

72.6842
Final Score
Avg: 83.1
71.8158
Quality
52.965
Cost
81
Promoting Interoperability

Reporting: Group practice

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 GREGORY FAHRENBACH, MD. To verify GREGORY FAHRENBACH, MD'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.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

126
Total Claims
$3K
Total Drug Cost
63
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
164
Total Day Supply
4,398
Brand Drug Cost
$0
Generic Drug Cost
$3K

Patient Demographics

Average Patient Age
73.7 years
Avg HCC Risk Score
0.90
Gender Split
59% female / 41% male

Top Prescribed Drugs (Medicare Part D)

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

What GREGORY FAHRENBACH, MD 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
Celecoxib
51
Naproxen
26
Diclofenac Sodium
24

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

Orthopaedic Trauma Physician Overview

How GREGORY FAHRENBACH, MD fits within the Orthopaedic Trauma Physician landscape nationally.

715
Orthopaedic Trauma Physician Providers in US
51
States with Orthopaedic Trauma Physician
160
Avg Claims per Provider

GREGORY FAHRENBACH, MD's 126 claims are below the specialty average of 160.

Nearby Orthopaedic Trauma Physician Providers in Illinois

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

Compare Orthopaedic Trauma Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is GREGORY FAHRENBACH, MD's specialty?
GREGORY FAHRENBACH, MD specializes in Orthopaedic Trauma Physician and practices in CHICAGO, Illinois. Credentials: MD.
How much does GREGORY FAHRENBACH, MD prescribe under Medicare Part D?
In 2023, GREGORY FAHRENBACH, MD wrote 126 Medicare Part D claims totaling $3K in drug costs for 63 beneficiaries.
What is GREGORY FAHRENBACH, MD's Medicare quality score?
GREGORY FAHRENBACH, MD has a CMS MIPS Final Score of 72.6842/100 (Quality: 71.8158, Cost: 52.965). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is GREGORY FAHRENBACH, MD located?
GREGORY FAHRENBACH, MD is located at 7447 W TALCOTT AVE, CHICAGO, IL, 60631. Phone: (773) 631-7898.
What is GREGORY FAHRENBACH, MD's NPI number?
GREGORY FAHRENBACH, MD's National Provider Identifier (NPI) is 1861475964, issued on 11/22/2005.
How many Orthopaedic Trauma Physician providers are there in the US?
There are 715 Orthopaedic Trauma Physician providers across 51 states in the US. The average Orthopaedic Trauma Physician provider writes 160 Medicare Part D claims per year.
What drugs does GREGORY FAHRENBACH, MD prescribe most often?
Based on 2023 Medicare Part D data, GREGORY FAHRENBACH, MD's most frequently prescribed drugs include Celecoxib, Naproxen, Diclofenac Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does GREGORY FAHRENBACH, MD accept Medicare?
GREGORY FAHRENBACH, MD appears in CMS Medicare data with 126 Part D claims and 63 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify GREGORY FAHRENBACH, MD's credentials?
GREGORY FAHRENBACH, MD's NPI is 1861475964 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

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.
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 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