NPI registry status
Active
2026 NPPES data Psychiatric Pharmacist NPI 1104020841 PHARMD, PHD
Verify on CMS → Mark Watanabe, PHARMD, PHD
Psychiatric Pharmacist in San Francisco, 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 880 in Psychiatric 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
266
Medicare Part D claims · 21 beneficiaries · Psychiatric Pharmacist avg: 382
What the federal data shows
Mark Watanabe, PHARMD, PHD filed 266 Medicare Part D claims in 2024 as a Psychiatric Pharmacist in San Francisco, California.
- 266
- Part D claims, 2024
- ≥48th
- pct by Part D claim volume (lower-bound band)
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 Mark Watanabe, PHARMD, PHD
Bare NPI registry listing — limited federal enrichment beyond basic enumeration. Verify all credentials with official sources.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1104020841), first enumerated 06/14/2007.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 266 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- State context
State board disciplinary context
California statewide board action statistics are published annually — these figures describe aggregate state activity, not Mark Watanabe, PHARMD, PHD's individual license status. Verify directly with the state medical board.
Source: MBC annual report 2023
- 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 1104020841 · Psychiatric Pharmacist
NPI-10 · ENUM-MID · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1104020841
- ENUM-MID 2007
- TAX-NARROW 880
- RX-LIGHT 266
- BOOK-THIN 108 in California
- PHOTO-ENUM Robert Brauner · 2007
Mark Watanabe, PHARMD, PHD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
266 ≥ 48th percentile 48% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
What does the federal data show about Mark Watanabe, PHARMD, PHD?
Quality data not reportedPrimary specialty
Psychiatric Pharmacist
Medicare Part D claims
266 30% vs specialty avg
Specialty distribution in California
How Psychiatric Pharmacist compares to other specialties among California 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 Psychiatric Pharmacist. Verify directly:
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
Provider Details
| NPI | 1104020841 |
|---|---|
| Specialty | Psychiatric Pharmacist |
| Credentials | PHARMD, PHD |
| Gender | Male |
| NPI Issued | 06/14/2007 |
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 Mark Watanabe, PHARMD, PHD. To verify Mark Watanabe, PHARMD, PHD'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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2024.
266
Total Claims
$3K
Total Drug Cost
21
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 375
- Total Day Supply
- 10,976
- Generic Drug Cost
- $3K
Patient Demographics
- Average Patient Age
- 69.2 years
- Avg HCC Risk Score
- 1.22
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Mark Watanabe, PHARMD, PHD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Trazodone Hcl
Trazodone Hcl
38 claims
- Mirtazapine
Mirtazapine
28 claims
- Aripiprazole
Aripiprazole
23 claims
- Lurasidone Hcl
Lurasidone Hcl
18 claims
- Duloxetine Hcl
Duloxetine Hcl
16 claims
- Escitalopram Oxalate
Escitalopram Oxalate
16 claims
- Quetiapine Fumarate 14
Quetiapine Fumarate
14 claims
- Risperidone 14
Risperidone
14 claims
| Drug | Claims |
|---|---|
| Trazodone Hcl | 38 |
| Mirtazapine | 28 |
| Aripiprazole | 23 |
| Lurasidone Hcl | 18 |
| Duloxetine Hcl | 16 |
| Escitalopram Oxalate | 16 |
| Quetiapine Fumarate | 14 |
| Risperidone | 14 |
| Sertraline Hcl | 13 |
| Gabapentin | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Psychiatric Pharmacist Overview
How Mark Watanabe, PHARMD, PHD fits within the Psychiatric Pharmacist landscape nationally.
880
Psychiatric Pharmacist Providers in US
50
States with Psychiatric Pharmacist
382
Avg Claims per Provider
Mark Watanabe, PHARMD, PHD's 266 claims are below the specialty average of 382.
Nationwide Psychiatric Pharmacist peers with similar MIPS or enrollment year
Two federal-record peer sets for Watanabe, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2007)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Psychiatric Pharmacist Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Watanabe.
One of 108 Psychiatric Pharmacist providers enrolled in California, 5 are shown here.
Amir Afshar
Fresno, CA
Dr. Olivia Albiar
PHARMD
Loma Linda, CA
Dr. Azita Alipour
PHARM.D.
Orange, CA
Dr. Kimberly Appleby
PHARM.D.
Los Angeles, CA
Dr. Lisa Arai
PHARM.D.
San Diego, CA
Compare Psychiatric Pharmacist nationally: see state-by-state distribution →
Frequently Asked Questions
What is Mark Watanabe, PHARMD, PHD's specialty? ▼
Mark Watanabe, PHARMD, PHD specializes in Psychiatric Pharmacist and practices in San Francisco, California. Credentials: PHARMD, PHD.
How much does Mark Watanabe, PHARMD, PHD prescribe under Medicare Part D? ▼
In 2024, Mark Watanabe, PHARMD, PHD wrote 266 Medicare Part D claims totaling $3K in drug costs for 21 beneficiaries.
Where is Mark Watanabe, PHARMD, PHD located? ▼
Mark Watanabe, PHARMD, PHD is located at 1380 HOWARD ST RM 130, San Francisco, CA, 94103. Phone: (415) 255-3659.
What is Mark Watanabe, PHARMD, PHD's NPI number? ▼
Mark Watanabe, PHARMD, PHD's National Provider Identifier (NPI) is 1104020841, issued on 06/14/2007.
How many Psychiatric Pharmacist providers are there in the US? ▼
There are 880 Psychiatric Pharmacist providers across 50 states in the US. The average Psychiatric Pharmacist provider writes 382 Medicare Part D claims per year.
What drugs does Mark Watanabe, PHARMD, PHD prescribe most often? ▼
Based on 2024 Medicare Part D data, Mark Watanabe, PHARMD, PHD's most frequently prescribed drugs include Trazodone Hcl, Mirtazapine, Aripiprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Watanabe, PHARMD, PHD accept Medicare? ▼
Mark Watanabe, PHARMD, PHD appears in CMS Medicare data with 266 Part D claims and 21 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Watanabe, PHARMD, PHD's credentials? ▼
Mark Watanabe, PHARMD, PHD's NPI is 1104020841 with credentials PHARMD, PHD. 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.
- 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
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.