2026 NPPES data Cardiovascular Disease Physician NPI 1851330104 M.D.
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William Robertson, M.D.

Cardiovascular Disease Physician in Scottsdale, Arizona. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 24,795 in Cardiovascular Disease 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
1K
Medicare Part D claims · 425 beneficiaries · Cardiovascular Disease Physician avg: 3K
Generic prescribing
83%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

William Robertson, M.D. filed 1,284 Medicare Part D claims in 2023 as a Cardiovascular Disease Physician in Scottsdale, Arizona, prescribing 83% generic.

1K
Part D claims, 2023
83%
generic prescribing

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.

William Robertson, M.D.'s Medicare Part D volume vs every U.S. prescriber

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

1,284 Top 22% higher than 78% 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%). This entry sits in this band. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2K+: 213,991 prescribers (16%). Above this entry. 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)

William Robertson, 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 William Robertson, M.D.?

Quality data not reported

NPI registry status

Active

Issued 06/05/2006

NPI 1851330104

Primary specialty

Cardiovascular Disease Physician

Mid-sized

24,795 US NPIs in this specialty

Medicare Part D claims

1,284 58% vs specialty avg

2023 prescription claims

Specialty avg: 3,033

Specialty distribution in Arizona

How Cardiovascular Disease Physician compares to other specialties among Arizona providers

Arizona providers
Pharmacist - 5.6%Pharmacist5.6%Behavior Technician - 5.6%Behavior Technician5.6%Family Nurse Practitioner - 4.3%Family Nurse Practitioner4.3%Physical Therapist - 4.2%Physical Therapist4.2%Speech-Language Pathologist - 3.5%Speech-Language Pathologist3.5%Student in an Organized Health Care Education/Training Program - 3.5%Student in an Organized Health Care Education/Training Program3.5%Cardiovascular Disease Physician - 0.4%Cardiovascular Disease Physician0.4%
Largest specialties in Arizona (% of in-state providers)

Board certification

Not published by CMS

CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Cardiovascular Disease Physician. Verify directly:

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).

William Robertson, M.D. appears in the CMS NPPES registry as a Cardiovascular Disease Physician provider holding M.D. credentials at 3099 N CIVIC CENTER PLZ, Scottsdale, AZ, 85251, with a listed phone of (480) 945-3535. NPI 1851330104 was issued on 06/05/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Robertson 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 1,284 prescription claims written by this provider, covering 425 Medicare beneficiaries and totaling roughly $271K in drug spend, split 17% brand-name and 83% 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.

Cardiovascular Disease Physician is a mid-sized specialty nationwide, with 24,795 enrolled providers across 54 states and an average of 3,033 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

3099 N CIVIC CENTER PLZ
Scottsdale, AZ 85251

Provider Details

NPI 1851330104
Specialty Cardiovascular Disease Physician
Credentials M.D.
Gender Male
NPI Issued 06/05/2006

Brand vs generic prescribing mix · Typical

William Robertson, M.D. - brand share 17.0%
Cardiovascular Disease Physician average

17% brand-name claims vs 83% generic, on 1,284 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.

1,284
Total Claims
$271K
Total Drug Cost
425
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
3,443
Total Day Supply
102,988
Brand vs Generic
17% brand / 83% generic
Brand Drug Cost
$247K
Generic Drug Cost
$25K

Patient Demographics

Average Patient Age
79.0 years
Avg HCC Risk Score
1.26
Gender Split
45% female / 55% male

Top Prescribed Drugs (Medicare Part D)

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

What William Robertson, 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
Rosuvastatin Calcium
134
Eliquis
Apixaban
129
Metoprolol Succinate
104
Irbesartan
102
Amlodipine Besylate
86
Atorvastatin Calcium
68
Lisinopril
43
Metoprolol Tartrate
42
Clopidogrel
Clopidogrel Bisulfate
37
Nebivolol Hcl
37

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

Cardiovascular Disease Physician Overview

How William Robertson, M.D. fits within the Cardiovascular Disease Physician landscape nationally.

24,795
Cardiovascular Disease Physician Providers in US
54
States with Cardiovascular Disease Physician
3,033
Avg Claims per Provider

William Robertson, M.D.'s 1,284 claims are below the specialty average of 3,033.

Nearby Cardiovascular Disease Physician Providers in Arizona

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

Compare Cardiovascular Disease Physician nationally: see state-by-state distribution →

Before you book an appointment

Use this federal record as your verification checklist, not as a recommendation.

  • Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
  • Check the active license and any disciplinary history with the Arizona medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Cardiovascular Disease Physician peer on Medicare volume and prescribing patterns. Compare providers

Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.

Frequently Asked Questions

What is William Robertson, M.D.'s specialty?
William Robertson, M.D. specializes in Cardiovascular Disease Physician and practices in Scottsdale, Arizona. Credentials: M.D..
How much does William Robertson, M.D. prescribe under Medicare Part D?
In 2023, William Robertson, M.D. wrote 1,284 Medicare Part D claims totaling $271K in drug costs for 425 beneficiaries.
Where is William Robertson, M.D. located?
William Robertson, M.D. is located at 3099 N CIVIC CENTER PLZ, Scottsdale, AZ, 85251. Phone: (480) 945-3535.
What is William Robertson, M.D.'s NPI number?
William Robertson, M.D.'s National Provider Identifier (NPI) is 1851330104, issued on 06/05/2006.
Does William Robertson, M.D. prescribe more brand-name or generic drugs?
William Robertson, M.D.'s prescribing is 17% brand-name and 83% generic drugs by claim count, with $247K in brand drug costs.
How many Cardiovascular Disease Physician providers are there in the US?
There are 24,795 Cardiovascular Disease Physician providers across 54 states in the US. The average Cardiovascular Disease Physician provider writes 3,033 Medicare Part D claims per year.
What drugs does William Robertson, M.D. prescribe most often?
Based on 2023 Medicare Part D data, William Robertson, M.D.'s most frequently prescribed drugs include Rosuvastatin Calcium, Eliquis, Metoprolol Succinate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does William Robertson, M.D. accept Medicare?
William Robertson, M.D. appears in CMS Medicare data with 1,284 Part D claims and 425 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify William Robertson, M.D.'s credentials?
William Robertson, M.D.'s NPI is 1851330104 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

Compiled from official public sources by the PlainDoctor editorial team.