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2026 NPPES data Rheumatology Physician NPI 1497787352 M.D.
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Robert Spencer, M.D.

Rheumatology Physician in Englewood, Colorado.

This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 6,377 in Rheumatology 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
4K
Medicare Part D claims · 510 beneficiaries · Rheumatology Physician avg: 2K
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
95.3/100
▲ 12 pts above national avg 83.5 · Exceptional
Industry payments
$1.0K
44 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

Robert Spencer, M.D. reported a CMS MIPS final score of 95.3/100 - above the 83.5 national average - and filed 3,673 Medicare Part D claims in 2024.

95.3/100
MIPS score · +12 vs avg
4K
Part D claims, 2024
91%
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.

Federal trust snapshot

What official records show about Robert Spencer, M.D.

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 1497787352), first enumerated 07/07/2006.

    Source: CMS NPPES

  • Reported

    Medicare Part D participation

    Filed 3,673 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 95.3/100 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

  • Reported

    Hospital affiliations

    1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.

    Source: CMS Care Compare

  • Reported

    Industry payment transparency

    $1.0K in reported industry payments (44 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.

    Source: CMS Open Payments

  • 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 1497787352 · Rheumatology Physician

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

  • NPI-10 1497787352
  • ENUM-LEGACY 2006
  • TAX-MID 6K Rheumatology Physician
  • MIPS-ELITE 95.3/100
  • RX-MID 3,673
  • BOOK-THIN 120 in Colorado
  • PHOTO-FINISH Ali Ajam · ±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

Robert Spencer, 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 ≥ 78th percentile 78% 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 Robert Spencer, M.D. sits

This provider among rheumatology physician peers

Across the 1,970 rheumatology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Robert Spencer, M.D. writes more Part D claims than 82% of them and scores higher on MIPS quality than 78% - placing this provider in the high-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 quality0255075100024.949.974.899.8Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 20Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 3Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 65Robert Spencer, M.D., Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 78
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one rheumatology physician peer from a representative sample of 60; the gold marker is Robert Spencer, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

Robert Spencer, 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 Robert Spencer, M.D.?

High performer (top quartile)

NPI registry status

Active

Issued 07/07/2006

NPI 1497787352

Primary specialty

Rheumatology Physician

Mid-sized

6,377 US NPIs in this specialty

Medicare Part D claims

3,673 78% vs specialty avg

2024 prescription claims

Specialty avg: 2,058

MIPS final score

95.3/100 11.8 pts vs avg

Exceptional band

vs 83.5 national avg

Specialty distribution in Colorado

How Rheumatology Physician compares to other specialties among Colorado providers

Colorado providers
Behavior Technician8.2%Mental Health Counselor6.1%Clinical Social Worker4.3%Physical Therapist4.2%Professional Counselor3.7%Registered Nurse3.6%Rheumatology Physician0.1%
Largest specialties in Colorado (% of in-state providers)

Medicare quality performance, MIPS

Robert Spencer, M.D.'s 2023 MIPS final score plotted against the Rheumatology Physician national average

High performer (top quartile)
MIPS Final Score
95.3/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%95.3%
MIPS final score (Rheumatology Physician) - 95.3/100 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

701 E HAMPDEN AVE
Englewood, CO 80113
(303) 788-1312

Provider Details

NPI 1497787352
Specialty Rheumatology Physician
Credentials M.D.
Gender Male
NPI Issued 07/07/2006

CMS Quality Score (MIPS)

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

95.3127
Final Score
Measured-score avg: 83.5
90.6254
Quality

Reporting: Group practice

Hospital and facility affiliations

Facilities where Robert Spencer, 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.

Colorado Arthritis Center
Englewood, 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 Robert Spencer, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$1.0K

Largest payer

Amgen 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 · Generic-heavy

Robert Spencer, M.D. - brand share 9.0%
Rheumatology Physician average

9% brand-name claims vs 91% generic, on 3,673 2024 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 2024.

3,673
Total Claims
$1.4M
Total Drug Cost
510
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
6,945.3
Total Day Supply
203,963
Brand vs Generic
9% brand / 91% generic
Brand Drug Cost
$1.3M
Generic Drug Cost
$95K
Opioid Claims
365 (9.9% rate)

Patient Demographics

Average Patient Age
74.4 years
Avg HCC Risk Score
1.59
Gender Split
70% female / 30% male
Age Distribution
<65: 35, 65-74: 228, 75-84: 202, 85+: 45

Top Prescribed Drugs (Medicare Part D)

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

What Robert Spencer, M.D. 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
Prednisone
 517
Methotrexate
Methotrexate Sodium
389
Hydroxychloroquine Sulfate
 374
Gabapentin
 298
Alendronate Sodium
 186
Celecoxib
 129
Allopurinol
 107
Folic Acid
 89
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
89
Meloxicam
 74

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

More Rheumatology Physician in CO → All providers in Colorado → Compare specialties →

Rheumatology Physician Overview

How Robert Spencer, M.D. fits within the Rheumatology Physician landscape nationally.

6,377
Rheumatology Physician Providers in US
52
States with Rheumatology Physician
2,058
Avg Claims per Provider

Robert Spencer, M.D.'s 3,673 claims are above the specialty average of 2,058.

Nationwide Rheumatology Physician peers with similar MIPS or enrollment year

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

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (95.3 here).

Anita Zachariah 95.3 IN Ali Ajam 95.3 OH Ruth Chan 95.3 OH Iziegbe Ehiorobo 95.3 OH

Same NPPES enumeration year (2006)

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

Seth Eisen Saint Louis, MO David Wanalista Berlin, MD Dimitrios Asters Astoria, NY Robert Leff Duluth, MN

Nearby Rheumatology Physician Providers in Colorado

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

One of 120 Rheumatology Physician providers enrolled in Colorado, 5 are shown here.

Phyllis Acker
RN
Lafayette, CO
Dr. Vivianne Allsop
MD
Denver, CO
Dr. Bjorn Anderson
MD
Denver, CO
Dr. Christopher Antolini
MD
Denver, CO
Dr. Elizabeth Arena
DO, MPH
Grand Junction, CO

Compare Rheumatology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is Robert Spencer, M.D.'s specialty? ▼
Robert Spencer, M.D. specializes in Rheumatology Physician and practices in Englewood, Colorado. Credentials: M.D..
How much does Robert Spencer, M.D. prescribe under Medicare Part D? ▼
In 2024, Robert Spencer, M.D. wrote 3,673 Medicare Part D claims totaling $1.4M in drug costs for 510 beneficiaries.
What is Robert Spencer, M.D.'s Medicare quality score? ▼
Robert Spencer, M.D. has a CMS MIPS Final Score of 95.3/100 (Quality: 90.6). 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 Robert Spencer, M.D. located? ▼
Robert Spencer, M.D. is located at 701 E HAMPDEN AVE, Englewood, CO, 80113. Phone: (303) 788-1312.
What is Robert Spencer, M.D.'s NPI number? ▼
Robert Spencer, M.D.'s National Provider Identifier (NPI) is 1497787352, issued on 07/07/2006.
Does Robert Spencer, M.D. prescribe more brand-name or generic drugs? ▼
Robert Spencer, M.D.'s prescribing is 9% brand-name and 91% generic drugs by claim count, with $1.3M in brand drug costs.
Does Robert Spencer, M.D. prescribe opioids? ▼
Yes, Robert Spencer, M.D. had 365 opioid claims in 2024 with an opioid prescribing rate of 9.9%.
How many Rheumatology Physician providers are there in the US? ▼
There are 6,377 Rheumatology Physician providers across 52 states in the US. The average Rheumatology Physician provider writes 2,058 Medicare Part D claims per year.
What drugs does Robert Spencer, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Robert Spencer, M.D.'s most frequently prescribed drugs include Prednisone, Methotrexate, Hydroxychloroquine Sulfate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Robert Spencer, M.D. accept Medicare? ▼
Robert Spencer, M.D. appears in CMS Medicare data with 3,673 Part D claims and 510 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Robert Spencer, M.D.'s credentials? ▼
Robert Spencer, M.D.'s NPI is 1497787352 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 (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.