2026 NPPES data Pharmacist NPI 1194972083 PHARM.D.
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Robert Rathbun, PHARM.D.

Pharmacist in San Diego, California. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 290,447 in Pharmacist, 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
229
Medicare Part D claims · 119 beneficiaries · Pharmacist avg: 135
Generic prescribing
22%
generic claims · 78% 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

Robert Rathbun, PHARM.D. filed 229 Medicare Part D claims in 2023 as a Pharmacist in San Diego, California, prescribing 22% generic.

229
Part D claims, 2023
22%
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.

Robert Rathbun, PHARM.D.'s Medicare Part D volume vs every U.S. prescriber

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

229 49th percentile higher than 49% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). This entry sits in this band. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 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

What does the federal data show about Robert Rathbun, PHARM.D.?

Quality data not reported

NPI registry status

Active

Issued 08/21/2008

NPI 1194972083

Primary specialty

Pharmacist

High-volume

290,447 US NPIs in this specialty

Medicare Part D claims

229 70% vs specialty avg

2023 prescription claims

Specialty avg: 135

Specialty distribution in California

How Pharmacist compares to other specialties among California providers

California providers

Largest specialties in California (% of in-state providers)

Behavior Technician - 17.3%Behavior Technician17.3%Marriage & Family Therapist - 5.5%Marriage & Family Therapist5.5%Student in an Organized Health Care Education/Training Program - 5%Student in an Organized Health Care Education/Training Program5%Mental Health Counselor - 3.9%Mental Health Counselor3.9%Pharmacist - 3.5%Pharmacist3.5%Clinical Social Worker - 3.1%Clinical Social Worker3.1%
Largest specialties in California (% 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 Pharmacist. 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).

Robert Rathbun, PHARM.D. appears in the CMS NPPES registry as a Pharmacist provider holding PHARM.D. credentials at VA SAN DIEGO HEALTHCARE SYSTEM, San Diego, CA, 92161, with a listed phone of (858) 552-8585. NPI 1194972083 was issued on 08/21/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Rathbun 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 229 prescription claims written by this provider, covering 119 Medicare beneficiaries and totaling roughly $1.5 million in drug spend, split 78% brand-name and 22% 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.

Pharmacist is a high-volume specialty nationwide, with 290,447 enrolled providers across 56 states and an average of 135 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

VA SAN DIEGO HEALTHCARE SYSTEM
San Diego, CA 92161

Provider Details

NPI 1194972083
Specialty Pharmacist
Credentials PHARM.D.
Gender Male
NPI Issued 08/21/2008

License & disciplinary context - California MBC 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 ~150K California medical licensees in 2023 - they are NOT specific to Robert Rathbun, PHARM.D.. To verify Robert Rathbun, PHARM.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases

MBC 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 California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Brand-heavy

Robert Rathbun, PHARM.D. - brand share 78.0%
Pharmacist average

78% brand-name claims vs 22% generic, on 229 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.

229
Total Claims
$1.5M
Total Drug Cost
119
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
496
Total Day Supply
14,680
Brand vs Generic
78% brand / 22% generic
Brand Drug Cost
$1.4M
Generic Drug Cost
$20K

Patient Demographics

Average Patient Age
70.0 years
Avg HCC Risk Score
1.74
Gender Split
17% female / 83% male

Top Prescribed Drugs (Medicare Part D)

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

What Robert Rathbun, PHARM.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
Sofosbuvir-Velpatasvir
Sofosbuvir/Velpatasvir
43
Biktarvy
Bictegrav/Emtricit/Tenofov Ala
31
Epclusa
Sofosbuvir/Velpatasvir
23
Triumeq
Abacavir/Dolutegravir/Lamivudi
11

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

Pharmacist Overview

How Robert Rathbun, PHARM.D. fits within the Pharmacist landscape nationally.

290,447
Pharmacist Providers in US
56
States with Pharmacist
135
Avg Claims per Provider

Robert Rathbun, PHARM.D.'s 229 claims are above the specialty average of 135.

Nearby Pharmacist Providers in California

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

Compare Pharmacist 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 California medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Pharmacist 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 Robert Rathbun, PHARM.D.'s specialty?
Robert Rathbun, PHARM.D. specializes in Pharmacist and practices in San Diego, California. Credentials: PHARM.D..
How much does Robert Rathbun, PHARM.D. prescribe under Medicare Part D?
In 2023, Robert Rathbun, PHARM.D. wrote 229 Medicare Part D claims totaling $1.5M in drug costs for 119 beneficiaries.
Where is Robert Rathbun, PHARM.D. located?
Robert Rathbun, PHARM.D. is located at VA SAN DIEGO HEALTHCARE SYSTEM, San Diego, CA, 92161. Phone: (858) 552-8585.
What is Robert Rathbun, PHARM.D.'s NPI number?
Robert Rathbun, PHARM.D.'s National Provider Identifier (NPI) is 1194972083, issued on 08/21/2008.
Does Robert Rathbun, PHARM.D. prescribe more brand-name or generic drugs?
Robert Rathbun, PHARM.D.'s prescribing is 78% brand-name and 22% generic drugs by claim count, with $1.4M in brand drug costs.
How many Pharmacist providers are there in the US?
There are 290,447 Pharmacist providers across 56 states in the US. The average Pharmacist provider writes 135 Medicare Part D claims per year.
What drugs does Robert Rathbun, PHARM.D. prescribe most often?
Based on 2023 Medicare Part D data, Robert Rathbun, PHARM.D.'s most frequently prescribed drugs include Sofosbuvir-Velpatasvir, Biktarvy, Epclusa. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Robert Rathbun, PHARM.D. accept Medicare?
Robert Rathbun, PHARM.D. appears in CMS Medicare data with 229 Part D claims and 119 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Robert Rathbun, PHARM.D.'s credentials?
Robert Rathbun, PHARM.D.'s NPI is 1194972083 with credentials PHARM.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.