2026 NPPES data Optometrist NPI 1144428491 O.D.
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TAMMY GRAY, O.D.

Optometrist in DENVER, Colorado. 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
150
Medicare Part D claims · 63 beneficiaries · Optometrist avg: 257
Generic prescribing
38%
generic claims · 62% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
94.942/100
▲ 12 pts above national avg 83.1 · [object Object]
Industry payments
$1.2K
38 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

TAMMY GRAY, O.D. reported a CMS MIPS final score of 94.942/100 — above the 83.1 national average — and filed 150 Medicare Part D claims in 2023.

94.942/100
MIPS score · +12 vs avg
150
Part D claims, 2023
38%
generic prescribing
$1.2K
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.

TAMMY GRAY, O.D.'s MIPS score vs every scored U.S. clinician

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

95 Top 25% higher than 75% 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%). Below this entry. 80–90: 129,887 scored providers (27%). Below this entry. 90–100: 189,403 scored providers (40%). This entry sits in this band. 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

What does the federal data show about TAMMY GRAY, O.D.?

High performer (top quartile)

NPI registry status

Active

Issued 07/09/2007

NPI 1144428491

Primary specialty

Optometrist

High-volume

60,463 US NPIs in this specialty

Medicare Part D claims

150 42% vs specialty avg

2023 prescription claims

Specialty avg: 257

MIPS final score

94.942/100 11.841999999999999% pts

Exceptional band

vs 83.1 national avg

Specialty distribution in Colorado

How Optometrist compares to other specialties among Colorado providers

Colorado providers

Optometrist share within Colorado

1. Optometrist42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Optometrist share within Colorado

Medicare quality performance — MIPS

TAMMY GRAY, O.D.'s 2023 MIPS final score plotted against the Optometrist national average

High performer (top quartile)
MIPS Final Score
94.942/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Optometrist) — 94.942/100 vs national avg 83.1

0%100%National avg83%94.9%
MIPS final score (Optometrist) — 94.942/100 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).

TAMMY GRAY, O.D. appears in the CMS NPPES registry as a Optometrist provider holding O.D. credentials at 4999 E KENTUCKY AVE, DENVER, CO, 80246, with a listed phone of (303) 691-2228. NPI 1144428491 was issued on 07/09/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GRAY 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 150 prescription claims written by this provider, covering 63 Medicare beneficiaries and totaling roughly $44K in drug spend, split 62% brand-name and 38% 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. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 94.942/100 for the 2023 performance year (Quality 100, Cost 83.14), compared with the national average of 83.1.

Optometrist is a high-volume specialty nationwide, with 60,463 enrolled providers across 56 states and an average of 257 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

4999 E KENTUCKY AVE
DENVER, CO 80246

Provider Details

NPI 1144428491
Specialty Optometrist
Credentials O.D.
Gender Female
NPI Issued 07/09/2007

CMS Quality Score (MIPS)

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

94.942
Final Score
Avg: 83.1
100
Quality
83.14
Cost

Reporting: Group practice

Hospital and facility affiliations

Facilities where TAMMY GRAY, O.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.

CHERRY CREEK EYE PHYSICIANS AND
DENVER, CO

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 TAMMY GRAY, O.D.. Source: openpaymentsdata.cms.gov.

Total received

$1.2K

Largest payer

Bausch & Lomb Americas 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 · Brand-heavy

TAMMY GRAY, O.D. — brand share 62.0%
Specialty average (est.)

62% brand-name claims vs 38% generic, on 150 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.

150
Total Claims
$44K
Total Drug Cost
63
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
236
Total Day Supply
6,262
Brand vs Generic
62% brand / 38% generic
Brand Drug Cost
$36K
Generic Drug Cost
$8K

Patient Demographics

Average Patient Age
74.2 years
Avg HCC Risk Score
1.10
Gender Split
70% female / 30% male

Top Prescribed Drugs (Medicare Part D)

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

What TAMMY GRAY, O.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
Latanoprost
25
Loteprednol Etabonate
12
Fluorometholone
11
Neomycin-Polymyxin-Dexameth
Neomycin/Polymyxin B/Dexametha
11
Vyzulta
Latanoprostene Bunod
11

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

Optometrist Overview

How TAMMY GRAY, O.D. fits within the Optometrist landscape nationally.

60,463
Optometrist Providers in US
56
States with Optometrist
257
Avg Claims per Provider

TAMMY GRAY, O.D.'s 150 claims are below the specialty average of 257.

Nearby Optometrist Providers in Colorado

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

Compare Optometrist nationally: see state-by-state distribution →

Frequently Asked Questions

What is TAMMY GRAY, O.D.'s specialty?
TAMMY GRAY, O.D. specializes in Optometrist and practices in DENVER, Colorado. Credentials: O.D..
How much does TAMMY GRAY, O.D. prescribe under Medicare Part D?
In 2023, TAMMY GRAY, O.D. wrote 150 Medicare Part D claims totaling $44K in drug costs for 63 beneficiaries.
What is TAMMY GRAY, O.D.'s Medicare quality score?
TAMMY GRAY, O.D. has a CMS MIPS Final Score of 94.942/100 (Quality: 100, Cost: 83.14). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is TAMMY GRAY, O.D. located?
TAMMY GRAY, O.D. is located at 4999 E KENTUCKY AVE, DENVER, CO, 80246. Phone: (303) 691-2228.
What is TAMMY GRAY, O.D.'s NPI number?
TAMMY GRAY, O.D.'s National Provider Identifier (NPI) is 1144428491, issued on 07/09/2007.
Does TAMMY GRAY, O.D. prescribe more brand-name or generic drugs?
TAMMY GRAY, O.D.'s prescribing is 62% brand-name and 38% generic drugs by claim count, with $36K in brand drug costs.
How many Optometrist providers are there in the US?
There are 60,463 Optometrist providers across 56 states in the US. The average Optometrist provider writes 257 Medicare Part D claims per year.
What drugs does TAMMY GRAY, O.D. prescribe most often?
Based on 2023 Medicare Part D data, TAMMY GRAY, O.D.'s most frequently prescribed drugs include Latanoprost, Loteprednol Etabonate, Fluorometholone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does TAMMY GRAY, O.D. accept Medicare?
TAMMY GRAY, O.D. appears in CMS Medicare data with 150 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 TAMMY GRAY, O.D.'s credentials?
TAMMY GRAY, O.D.'s NPI is 1144428491 with credentials O.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.
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