NPI registry status
Active
2026 NPPES data Physician Assistant NPI 1659784130 PAC
Verify on CMS → Tanya Marcus, PAC
Physician Assistant in El Cajon, 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 150,974 in Physician Assistant, 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
5K
Medicare Part D claims · 259 beneficiaries · Physician Assistant avg: 790
Generic prescribing
78%
generic claims · 22% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Tanya Marcus, PAC filed 5,201 Medicare Part D claims in 2023 as a Physician Assistant in El Cajon, California, prescribing 78% generic.
- 5K
- Part D claims, 2023
- 78%
- generic prescribing
- ≥94th
- 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 Tanya Marcus, PAC
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1659784130), first enumerated 06/03/2014.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 5,201 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- State context
State board disciplinary context
California statewide board action statistics are published annually — these figures describe aggregate state activity, not Tanya Marcus, PAC'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 1659784130 · Physician Assistant
NPI-10 · ENUM-MID · TAX-MEGA · RX-MID · BOOK-MID · PHOTO-ENUM
- NPI-10 1659784130
- ENUM-MID 2014
- TAX-MEGA 151K Physician Assistant
- RX-MID 5,201
- BOOK-MID 13,402 in California
- PHOTO-ENUM Elizabeth Denardis · 2014
Tanya Marcus, PAC's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
5,201 ≥ 94th percentile 94% of 1,370,886 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 · 2023
What does the federal data show about Tanya Marcus, PAC?
Quality data not reportedPrimary specialty
Physician Assistant
Medicare Part D claims
5,201 7× vs specialty avg
Specialty distribution in California
How Physician Assistant 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 Physician Assistant. 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 | 1659784130 |
|---|---|
| Specialty | Physician Assistant |
| Credentials | PAC |
| Gender | Female |
| NPI Issued | 06/03/2014 |
Hospital and facility affiliations
Facilities where Tanya Marcus, PAC 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.
Brian H Weeks MD Inc
San Diego, CA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Tanya Marcus, PAC. To verify Tanya Marcus, PAC'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 · Typical
Tanya Marcus, PAC - brand share 22.0%
Physician Assistant average
22% brand-name claims vs 78% generic, on 5,201 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.
5,201
Total Claims
$839K
Total Drug Cost
259
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 5,263
- Total Day Supply
- 140,908
- Brand vs Generic
- 22% brand / 78% generic
- Brand Drug Cost
- $631K
- Generic Drug Cost
- $207K
- Opioid Claims
- 24 (0.5% rate)
- Antibiotic Claims
- 78
Patient Demographics
- Average Patient Age
- 74.9 years
- Avg HCC Risk Score
- 2.53
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 23, 65-74: 111, 75-84: 89, 85+: 36
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Tanya Marcus, PAC prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
453 claims
- Gabapentin
Gabapentin
198 claims
- Pantoprazole Sodium 153
Pantoprazole Sodium
153 claims
- Famotidine 149
Famotidine
149 claims
- Jardiance 149
Jardiance
149 claims
- Omeprazole 144
Omeprazole
144 claims
- Amlodipine Besylate 137
Amlodipine Besylate
137 claims
- Furosemide 137
Furosemide
137 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 453 |
| Gabapentin | 198 |
| Pantoprazole Sodium | 153 |
| Famotidine | 149 |
| Jardiance Empagliflozin | 149 |
| Omeprazole | 144 |
| Amlodipine Besylate | 137 |
| Furosemide | 137 |
| Levothyroxine Sodium | 136 |
| Lisinopril | 124 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Physician Assistant Overview
How Tanya Marcus, PAC fits within the Physician Assistant landscape nationally.
150,974
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider
Tanya Marcus, PAC's 5,201 claims are above the specialty average of 790.
Nationwide Physician Assistant peers with similar MIPS or enrollment year
Two federal-record peer sets for Marcus, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2014)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Physician Assistant Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Marcus.
One of 13,402 Physician Assistant providers enrolled in California, 5 are shown here.
Dr. Marcia -Galbraith
PA
Stockton, CA
Dr. Danny Abad
PA
Orange, CA
Dr. Lea Dominique Abadies
PA
Tustin, CA
Dr. Rea Elizabeth Abaniel
P.A.-C
Seal Beach, CA
Dr. Ramina Abbasi
PA-C
Signal Hill, CA
Compare Physician Assistant nationally: see state-by-state distribution →
Frequently Asked Questions
What is Tanya Marcus, PAC's specialty? ▼
Tanya Marcus, PAC specializes in Physician Assistant and practices in El Cajon, California. Credentials: PAC.
How much does Tanya Marcus, PAC prescribe under Medicare Part D? ▼
In 2023, Tanya Marcus, PAC wrote 5,201 Medicare Part D claims totaling $839K in drug costs for 259 beneficiaries.
Where is Tanya Marcus, PAC located? ▼
Tanya Marcus, PAC is located at 1306 BROADWAY, El Cajon, CA, 92021. Phone: (619) 551-7400.
What is Tanya Marcus, PAC's NPI number? ▼
Tanya Marcus, PAC's National Provider Identifier (NPI) is 1659784130, issued on 06/03/2014.
Does Tanya Marcus, PAC prescribe more brand-name or generic drugs? ▼
Tanya Marcus, PAC's prescribing is 22% brand-name and 78% generic drugs by claim count, with $631K in brand drug costs.
Does Tanya Marcus, PAC prescribe opioids? ▼
Yes, Tanya Marcus, PAC had 24 opioid claims in 2023 with an opioid prescribing rate of 0.5%.
How many Physician Assistant providers are there in the US? ▼
There are 150,974 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
What drugs does Tanya Marcus, PAC prescribe most often? ▼
Based on 2023 Medicare Part D data, Tanya Marcus, PAC's most frequently prescribed drugs include Atorvastatin Calcium, Gabapentin, Pantoprazole Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Tanya Marcus, PAC accept Medicare? ▼
Tanya Marcus, PAC appears in CMS Medicare data with 5,201 Part D claims and 259 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Tanya Marcus, PAC's credentials? ▼
Tanya Marcus, PAC's NPI is 1659784130 with credentials PAC. 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 (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
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 May 2026.