NPI registry status
Active
2026 NPPES data Obstetrics Physician NPI 1871705251 N.P.
Verify on CMS → Dena Tilley, N.P.
Obstetrics Physician in San Luis Obispo, 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 1,420 in Obstetrics 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
588
Medicare Part D claims · 138 beneficiaries · Obstetrics Physician avg: 331
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$341.67
14 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Dena Tilley, N.P. filed 588 Medicare Part D claims in 2024 as an Obstetrics Physician in San Luis Obispo, California, prescribing 86% generic.
- 588
- Part D claims, 2024
- 86%
- generic prescribing
- $341.67
- industry payments (Sunshine Act)
- ≥65th
- 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 Dena Tilley, N.P.
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 1871705251), first enumerated 05/05/2007.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 588 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Reported
Industry payment transparency
$341.67 in reported industry payments (14 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
California statewide board action statistics are published annually — these figures describe aggregate state activity, not Dena Tilley, N.P.'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 1871705251 · Obstetrics Physician
NPI-10 · ENUM-MID · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1871705251
- ENUM-MID 2007
- TAX-NARROW 1,420
- RX-LIGHT 588
- BOOK-THIN 165 in California
- PHOTO-ENUM Stephanie Scheidt, MD · 2007
Dena Tilley, N.P.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
588 ≥ 65th percentile 65% 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
◑
Board-eligible specialty (heuristic, not verified)
Dena Tilley, N.P. 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 Dena Tilley, N.P.?
Quality data not reportedPrimary specialty
Obstetrics Physician
Medicare Part D claims
588 78% vs specialty avg
Specialty distribution in California
How Obstetrics Physician 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 Obstetrics Physician. 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 | 1871705251 |
|---|---|
| Specialty | Obstetrics Physician |
| Credentials | N.P. |
| Gender | Female |
| NPI Issued | 05/05/2007 |
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 Dena Tilley, N.P.. Source: openpaymentsdata.cms.gov.
Total received
$342
Largest payer
Novo Nordisk 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 Dena Tilley, N.P.. To verify Dena Tilley, N.P.'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
Dena Tilley, N.P. - brand share 14.0%
Obstetrics Physician average
14% brand-name claims vs 86% generic, on 588 2024 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 2024.
588
Total Claims
$52K
Total Drug Cost
138
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,268.633
- Total Day Supply
- 36,814
- Brand vs Generic
- 14% brand / 86% generic
- Brand Drug Cost
- $28K
- Generic Drug Cost
- $25K
- Antibiotic Claims
- 22
Patient Demographics
- Average Patient Age
- 68.1 years
- Avg HCC Risk Score
- 0.83
- Age Distribution
- <65: 25, 65-74: 79, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Dena Tilley, N.P. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Estradiol
Estradiol
163 claims
- Progesterone
Progesterone
88 claims
- Estradiol (Twice W… 55
Estradiol (Twice Weekly)
55 claims
- Nystatin 16
Nystatin
16 claims
- Levothyroxine Sodium 15
Levothyroxine Sodium
15 claims
- Dotti 14
Dotti
14 claims
- Estradiol-Norethin… 14
Estradiol-Norethindrone Acetat
14 claims
- Venlafaxine Hcl Er 14
Venlafaxine Hcl Er
14 claims
| Drug | Claims |
|---|---|
| Estradiol | 163 |
| Progesterone Progesterone, Micronized | 88 |
| Estradiol (Twice Weekly) Estradiol | 55 |
| Nystatin | 16 |
| Levothyroxine Sodium | 15 |
| Dotti Estradiol | 14 |
| Estradiol-Norethindrone Acetat Estradiol/Norethindrone Acet | 14 |
| Venlafaxine Hcl Er Venlafaxine Hcl | 14 |
| Estradiol (Once Weekly) Estradiol | 13 |
| Sertraline Hcl | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Obstetrics Physician Overview
How Dena Tilley, N.P. fits within the Obstetrics Physician landscape nationally.
1,420
Obstetrics Physician Providers in US
54
States with Obstetrics Physician
331
Avg Claims per Provider
Dena Tilley, N.P.'s 588 claims are above the specialty average of 331.
Nationwide Obstetrics Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Tilley, 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 Obstetrics Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Tilley.
One of 165 Obstetrics Physician providers enrolled in California, 5 are shown here.
Dr. Nayeema Ahmed
M.D.
Riverside, CA
Dr. Rimsha Ahmed
M.D.
Los Angeles, CA
Dr. Mohsin Ali
M.D.
Cerritos, CA
Dr. Lysistrati Alimonos
D.O.
San Diego, CA
Dr. Yanett Anaya
MD
San Francisco, CA
Compare Obstetrics Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Dena Tilley, N.P.'s specialty? ▼
Dena Tilley, N.P. specializes in Obstetrics Physician and practices in San Luis Obispo, California. Credentials: N.P..
How much does Dena Tilley, N.P. prescribe under Medicare Part D? ▼
In 2024, Dena Tilley, N.P. wrote 588 Medicare Part D claims totaling $52K in drug costs for 138 beneficiaries.
Where is Dena Tilley, N.P. located? ▼
Dena Tilley, N.P. is located at 1551 BISHOP ST, San Luis Obispo, CA, 93401. Phone: (805) 549-0402.
What is Dena Tilley, N.P.'s NPI number? ▼
Dena Tilley, N.P.'s National Provider Identifier (NPI) is 1871705251, issued on 05/05/2007.
Does Dena Tilley, N.P. prescribe more brand-name or generic drugs? ▼
Dena Tilley, N.P.'s prescribing is 14% brand-name and 86% generic drugs by claim count, with $28K in brand drug costs.
How many Obstetrics Physician providers are there in the US? ▼
There are 1,420 Obstetrics Physician providers across 54 states in the US. The average Obstetrics Physician provider writes 331 Medicare Part D claims per year.
What drugs does Dena Tilley, N.P. prescribe most often? ▼
Based on 2024 Medicare Part D data, Dena Tilley, N.P.'s most frequently prescribed drugs include Estradiol, Progesterone, Estradiol (Twice Weekly). This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Dena Tilley, N.P. accept Medicare? ▼
Dena Tilley, N.P. appears in CMS Medicare data with 588 Part D claims and 138 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Dena Tilley, N.P.'s credentials? ▼
Dena Tilley, N.P.'s NPI is 1871705251 with credentials N.P.. 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.