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2026 NPPES data Endocrinology, Diabetes & Metabolism Physician NPI 1174626063 M.D.
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Guillermo Umpierrez, M.D.

Endocrinology, Diabetes & Metabolism Physician in Atlanta, Georgia.

This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 7,871 in Endocrinology, Diabetes & Metabolism 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
284
Medicare Part D claims · 68 beneficiaries · Endocrinology, Diabetes & Metabolism Physician avg: 3K
Generic prescribing
42%
generic claims · 47% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
94.6/100
▲ 11 pts above national avg 83.5 · Exceptional
Industry payments
$11.3K
32 payments · CMS Open Payments (Sunshine Act)
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Guillermo Umpierrez, M.D. reported a CMS MIPS final score of 94.6/100 - above the 83.5 national average - and filed 284 Medicare Part D claims in 2023.

94.6/100
MIPS score · +11 vs avg
284
Part D claims, 2023
42%
generic prescribing
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.

CMS NPPES provider registry desk

NPI 1174626063 · Endocrinology, Diabetes & Metabolism Physician

NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-ELITE · RX-LIGHT · BOOK-THIN · PHOTO-FINISH

  • NPI-10 1174626063
  • ENUM-LEGACY 2006
  • TAX-MID 8K Endocrinology, Diabetes
  • MIPS-ELITE 94.6/100
  • RX-LIGHT 284
  • BOOK-THIN 208 in Georgia
  • PHOTO-FINISH Alfred Harney · ±0.0

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

Guillermo Umpierrez, M.D.'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.

95 ≥ 73rd percentile 73% 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%). Below this entry. 90+: 189,403 measured providers (42%). This entry sits in this band. 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 Guillermo Umpierrez, M.D. sits

This provider among endocrinology, diabetes & metabolism physician peers

Across the 2,341 endocrinology, diabetes & metabolism physician providers who report both Medicare Part D prescribing and a MIPS quality score, Guillermo Umpierrez, M.D. writes more Part D claims than 10% of them and scores higher on MIPS quality than 77% - 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: 47 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 3Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 98Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 98Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 15Guillermo Umpierrez, M.D., Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 77
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one endocrinology, diabetes & metabolism physician peer from a representative sample of 60; the gold marker is Guillermo Umpierrez, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

Guillermo Umpierrez, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - 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 Guillermo Umpierrez, M.D.?

High performer (top quartile)

NPI registry status

Active

Issued 09/06/2006

NPI 1174626063

Primary specialty

Endocrinology, Diabetes & Metabolism Physician

Mid-sized

7,871 US NPIs in this specialty

Medicare Part D claims

284 89% vs specialty avg

2023 prescription claims

Specialty avg: 2,639

MIPS final score

94.6/100 11.1 pts vs avg

Exceptional band

vs 83.5 national avg

Specialty distribution in Georgia

How Endocrinology, Diabetes & Metabolism Physician compares to other specialties among Georgia providers

Georgia providers
Behavior Technician7.3%Pharmacist5.1%Student in an Organized Heal…5%Family Nurse Practitioner4.8%Physical Therapist3.9%Professional Counselor3.6%Endocrinology, Diabetes & Me…0.1%
Largest specialties in Georgia (% of in-state providers)

Medicare quality performance, MIPS

Guillermo Umpierrez, M.D.'s 2023 MIPS final score plotted against the Endocrinology, Diabetes & Metabolism Physician national average

High performer (top quartile)
MIPS Final Score
94.6/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%94.6%
MIPS final score (Endocrinology, Diabetes & Metabolism Physician) - 94.6/100 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

96 ARMSTRONG ST SE
Atlanta, GA 30303
(404) 616-3730

Provider Details

NPI 1174626063
Specialty Endocrinology, Diabetes & Metabolism Physician
Credentials M.D.
Gender Male
NPI Issued 09/06/2006

CMS Quality Score (MIPS)

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

94.5685
Final Score
Measured-score avg: 83.5
78.4959
Quality
75.5403
Cost
100
Promoting Interoperability

Reporting: Group practice

Hospital and facility affiliations

Facilities where Guillermo Umpierrez, M.D. 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.

Emory Medical Care Foundation Inc
Atlanta, 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 Guillermo Umpierrez, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$11.3K

Largest payer

Dexcom, 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 · Above average

Guillermo Umpierrez, M.D. - brand share 47.0%
Endocrinology, Diabetes & Metabolism Physician average

47% brand-name claims vs 42% generic, on 284 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.

284
Total Claims
$111K
Total Drug Cost
68
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
638
Total Day Supply
18,803
Brand vs Generic
47% brand / 42% generic
Brand Drug Cost
$107K
Generic Drug Cost
$2K

Patient Demographics

Average Patient Age
67.6 years
Avg HCC Risk Score
1.80
Gender Split
65% female / 35% male
Age Distribution
<65: 18, 65-74: 34, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

What Guillermo Umpierrez, M.D. 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
Farxiga
Dapagliflozin Propanediol
21
Janumet
Sitagliptin Phos/Metformin Hcl
21
Ozempic
Semaglutide
13
Alendronate Sodium
 12
Amlodipine Besylate
 12
Levemir Flexpen
Insulin Detemir
12
Levothyroxine Sodium
 12
Rosuvastatin Calcium
 12
Lantus Solostar
"Insulin Glargine
N/A
Nano 2nd Gen Pen Needle
"Pen Needle
N/A

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

More Endocrinology, Diabetes & Metabolism Physician in GA → All providers in Georgia → Compare specialties →

Endocrinology, Diabetes & Metabolism Physician Overview

How Guillermo Umpierrez, M.D. fits within the Endocrinology, Diabetes & Metabolism Physician landscape nationally.

7,871
Endocrinology, Diabetes & Metabolism Physician Providers in US
54
States with Endocrinology, Diabetes & Metabolism Physician
2,639
Avg Claims per Provider

Guillermo Umpierrez, M.D.'s 284 claims are below the specialty average of 2,639.

Nationwide Endocrinology, Diabetes & Metabolism Physician peers with similar MIPS or enrollment year

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

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (94.6 here).

Maya Fayfman 94.6 MA Alfred Harney 94.6 IL Poornima Jayaramaiah 94.6 IL Gayle Kasdorf 94.6 WI

Same NPPES enumeration year (2006)

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

Chandana Mishra Scottsdale, AZ Abel Alfonso Mankato, MN Michael Robinson Inglewood, CA Melba Feliciano San Juan, PR

Nearby Endocrinology, Diabetes & Metabolism Physician Providers in Georgia

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

One of 208 Endocrinology, Diabetes & Metabolism Physician providers enrolled in Georgia, 5 are shown here.

Dr. Sayed Aamir
M.D.
Snellville, GA
Dr. Saira Adeel
M.D.
Austell, GA
Tanya Aggarwal
Gainesville, GA
Dr. Bilal Ahmad
MD
Jonesboro, GA
Dr. Anota Akofu
M.D.
Carrollton, GA

Compare Endocrinology, Diabetes & Metabolism Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is Guillermo Umpierrez, M.D.'s specialty? ▼
Guillermo Umpierrez, M.D. specializes in Endocrinology, Diabetes & Metabolism Physician and practices in Atlanta, Georgia. Credentials: M.D..
How much does Guillermo Umpierrez, M.D. prescribe under Medicare Part D? ▼
In 2023, Guillermo Umpierrez, M.D. wrote 284 Medicare Part D claims totaling $111K in drug costs for 68 beneficiaries.
What is Guillermo Umpierrez, M.D.'s Medicare quality score? ▼
Guillermo Umpierrez, M.D. has a CMS MIPS Final Score of 94.6/100 (Quality: 78.5, Cost: 75.5). 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 Guillermo Umpierrez, M.D. located? ▼
Guillermo Umpierrez, M.D. is located at 96 ARMSTRONG ST SE, Atlanta, GA, 30303. Phone: (404) 616-3730.
What is Guillermo Umpierrez, M.D.'s NPI number? ▼
Guillermo Umpierrez, M.D.'s National Provider Identifier (NPI) is 1174626063, issued on 09/06/2006.
Does Guillermo Umpierrez, M.D. prescribe more brand-name or generic drugs? ▼
Guillermo Umpierrez, M.D.'s prescribing is 47% brand-name and 42% generic drugs by claim count, with $107K in brand drug costs.
How many Endocrinology, Diabetes & Metabolism Physician providers are there in the US? ▼
There are 7,871 Endocrinology, Diabetes & Metabolism Physician providers across 54 states in the US. The average Endocrinology, Diabetes & Metabolism Physician provider writes 2,639 Medicare Part D claims per year.
What drugs does Guillermo Umpierrez, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Guillermo Umpierrez, M.D.'s most frequently prescribed drugs include Farxiga, Janumet, Ozempic. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Guillermo Umpierrez, M.D. accept Medicare? ▼
Guillermo Umpierrez, M.D. appears in CMS Medicare data with 284 Part D claims and 68 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Guillermo Umpierrez, M.D.'s credentials? ▼
Guillermo Umpierrez, M.D.'s NPI is 1174626063 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

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 (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

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 May 2026.