NPI registry status
Active
2026 NPPES data Obstetrics & Gynecology Physician NPI 1912908955 MD
Verify on CMS → Tricia Markusen, MD
Obstetrics & Gynecology Physician in Monterey, 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 44,326 in Obstetrics & Gynecology 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 · 293 beneficiaries · Obstetrics & Gynecology Physician avg: 179
MIPS score
92.8/100
▲ 9 pts above national avg 83.5 · Exceptional
Industry payments
$364.94
21 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Tricia Markusen, MD reported a CMS MIPS final score of 92.8/100 - above the 83.5 national average - and filed 1,115 Medicare Part D claims in 2023.
- 92.8/100
- MIPS score · +9 vs avg
- 1K
- Part D claims, 2023
- Likely
- board-certified (heuristic)
- ≥66th
- pct among measured MIPS (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.
Tricia Markusen, MD'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.
93 ≥ 66th percentile 66% of 454,083 measured providers are in lower value bands
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 Tricia Markusen, MD sits
This provider among obstetrics & gynecology physician peers
Across the 7,360 obstetrics & gynecology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Tricia Markusen, MD writes more Part D claims than 98% of them and scores higher on MIPS quality than 72% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one obstetrics & gynecology physician peer from a representative sample of 60; the gold marker is Tricia Markusen, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Tricia Markusen, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 Tricia Markusen, MD?
High performer (top quartile)Primary specialty
Obstetrics & Gynecology Physician
Medicare Part D claims
1,115 6× vs specialty avg
MIPS final score
92.8/100 9.3 pts vs avg
Specialty distribution in California
How Obstetrics & Gynecology Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Tricia Markusen, MD's 2023 MIPS final score plotted against the Obstetrics & Gynecology Physician national average
- MIPS Final Score
- 92.8/100
- vs 83.5 national avg · 2023 performance year
MIPS final score (Obstetrics & Gynecology Physician) - 92.8/100 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).
Tricia Markusen, MD appears in the CMS NPPES registry as an Obstetrics & Gynecology Physician provider holding MD credentials at 889 PACIFIC ST, Monterey, CA, 93940, with a listed phone of (831) 649-0175. NPI 1912908955 was issued on 08/01/2005.
Medicare Part D records for calendar year 2023 show 1,115 prescription claims written by this provider, covering 293 Medicare beneficiaries and totaling roughly $135K in drug spend. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 92.8/100 for the 2023 performance year (Quality 92, Cost 84), compared with the 83.5 average among clinicians with a measured score.
Obstetrics & Gynecology Physician is a mid-sized specialty nationwide, with 44,326 enrolled providers across 56 states and an average of 179 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
Provider Details
| NPI | 1912908955 |
|---|---|
| Specialty | Obstetrics & Gynecology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 08/01/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
92.8048
Final Score
Measured-score avg: 83.5
91.9865
Quality
84.0294
Cost
100
Promoting Interoperability
Reporting: Individual
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 Tricia Markusen, MD. Source: openpaymentsdata.cms.gov.
Total received
$365
Largest payer
Astellas Pharma US 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.
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 Tricia Markusen, MD. To verify Tricia Markusen, MD'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 2023.
1,115
Total Claims
$135K
Total Drug Cost
293
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,367
- Total Day Supply
- 66,199
- Generic Drug Cost
- $47K
- Antibiotic Claims
- 71
Patient Demographics
- Average Patient Age
- 75.3 years
- Avg HCC Risk Score
- 0.82
- Gender Split
- 100% female / 0% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Tricia Markusen, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Estradiol
Estradiol
189 claims
- Alendronate Sodium 69
Alendronate Sodium
69 claims
- Clotrimazole-Betam… 59
Clotrimazole-Betamethasone
59 claims
- Valacyclovir 53
Valacyclovir
53 claims
- Estradiol (Once We… 51
Estradiol (Once Weekly)
51 claims
- Estradiol (Twice W… 50
Estradiol (Twice Weekly)
50 claims
- Fluconazole 31
Fluconazole
31 claims
- Nystatin 29
Nystatin
29 claims
| Drug | Claims |
|---|---|
| Estradiol | 189 |
| Alendronate Sodium | 69 |
| Clotrimazole-Betamethasone Clotrimazole/Betamethasone Dip | 59 |
| Valacyclovir Valacyclovir Hcl | 53 |
| Estradiol (Once Weekly) Estradiol | 51 |
| Estradiol (Twice Weekly) Estradiol | 50 |
| Fluconazole | 31 |
| Nystatin | 29 |
| Estring Estradiol | 27 |
| Ibandronate Sodium | 27 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Obstetrics & Gynecology Physician Overview
How Tricia Markusen, MD fits within the Obstetrics & Gynecology Physician landscape nationally.
44,326
Obstetrics & Gynecology Physician Providers in US
56
States with Obstetrics & Gynecology Physician
179
Avg Claims per Provider
Tricia Markusen, MD's 1,115 claims are above the specialty average of 179.
Nearby Obstetrics & Gynecology Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Markusen.
Dr. Ingrid Aalami
MD
San Jose, CA
Dr. Avisa Abaian- Eagar
M.D.
Orange, CA
Dr. Derek Abbassi
MD
Walnut Creek, CA
Dr. Nicole Abell
DO
Ventura, CA
Zachary Abelson
Los Angeles, CA
Compare Obstetrics & Gynecology 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 California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Obstetrics & Gynecology 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.
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Frequently Asked Questions
What is Tricia Markusen, MD's specialty? ▼
Tricia Markusen, MD specializes in Obstetrics & Gynecology Physician and practices in Monterey, California. Credentials: MD.
How much does Tricia Markusen, MD prescribe under Medicare Part D? ▼
In 2023, Tricia Markusen, MD wrote 1,115 Medicare Part D claims totaling $135K in drug costs for 293 beneficiaries.
What is Tricia Markusen, MD's Medicare quality score? ▼
Tricia Markusen, MD has a CMS MIPS Final Score of 92.8/100 (Quality: 92, Cost: 84). 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 Tricia Markusen, MD located? ▼
Tricia Markusen, MD is located at 889 PACIFIC ST, Monterey, CA, 93940. Phone: (831) 649-0175.
What is Tricia Markusen, MD's NPI number? ▼
Tricia Markusen, MD's National Provider Identifier (NPI) is 1912908955, issued on 08/01/2005.
How many Obstetrics & Gynecology Physician providers are there in the US? ▼
There are 44,326 Obstetrics & Gynecology Physician providers across 56 states in the US. The average Obstetrics & Gynecology Physician provider writes 179 Medicare Part D claims per year.
What drugs does Tricia Markusen, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Tricia Markusen, MD's most frequently prescribed drugs include Estradiol, Alendronate Sodium, Clotrimazole-Betamethasone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Tricia Markusen, MD accept Medicare? ▼
Tricia Markusen, MD appears in CMS Medicare data with 1,115 Part D claims and 293 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Tricia Markusen, MD's credentials? ▼
Tricia Markusen, MD's NPI is 1912908955 with credentials MD. 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.
- 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 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.