NPI registry status
Active
2026 NPPES data Hematology (Internal Medicine) Physician NPI 1487684148 MD
Verify on CMS → Haluk Tezcan, MD
Hematology (Internal Medicine) Physician in Stanford, 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 1,483 in Hematology (Internal Medicine) 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
133
Medicare Part D claims · 63 beneficiaries · Hematology (Internal Medicine) Physician avg: 684
Generic prescribing
83%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Haluk Tezcan, MD filed 133 Medicare Part D claims in 2024 as a Hematology (Internal Medicine) Physician in Stanford, California, prescribing 83% generic.
- 133
- Part D claims, 2024
- 83%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥34th
- 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 Haluk Tezcan, MD
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 1487684148), first enumerated 07/05/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 133 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
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
3 CMS Care Compare hospital affiliations 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 Haluk Tezcan, MD'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 1487684148 · Hematology (Internal Medicine) Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1487684148
- ENUM-LEGACY 2006
- TAX-NARROW 1,483
- RX-LIGHT 133
- BOOK-THIN 132 in California
- PHOTO-ENUM Max Sung · 2006
Haluk Tezcan, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
133 ≥ 34th percentile 34% 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 certification likely (heuristic, not verified)
Haluk Tezcan, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 3 hospital affiliations - 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 Haluk Tezcan, MD?
Quality data not reportedPrimary specialty
Hematology (Internal Medicine) Physician
Medicare Part D claims
133 81% vs specialty avg
Specialty distribution in California
How Hematology (Internal Medicine) 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 Hematology (Internal Medicine) 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 | 1487684148 |
|---|---|
| Specialty | Hematology (Internal Medicine) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 07/05/2006 |
Hospital and facility affiliations
Facilities where Haluk Tezcan, MD 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.
According to CMS billing records, Haluk Tezcan, MD is affiliated with 3 Medicare-billing facilities across 3 states, 1 of which carry a CMS Hospital overall star rating.
Stanford Health Care
★★★★★ 5/5
Stanford, CA
Acute Care Hospitals
CMS CCN: 050441
North Platte Nebraska Hospital Corporation
North Platte, NE
Sky Lakes Medical Center Inc
Klamath Falls, OR
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 Haluk Tezcan, MD. To verify Haluk Tezcan, 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.
Brand vs generic prescribing mix · Typical
Haluk Tezcan, MD - brand share 17.0%
Hematology (Internal Medicine) Physician average
17% brand-name claims vs 83% generic, on 133 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.
133
Total Claims
$170K
Total Drug Cost
63
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 171.9
- Total Day Supply
- 4,424
- Brand vs Generic
- 17% brand / 83% generic
- Brand Drug Cost
- $140K
- Generic Drug Cost
- $31K
Patient Demographics
- Average Patient Age
- 73.5 years
- Avg HCC Risk Score
- 2.68
- Gender Split
- 59% female / 41% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Tamoxifen Citrate | 19 |
| Anastrozole | 15 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Hematology (Internal Medicine) Physician in CA →
All providers in California →
Compare specialties →
Hematology (Internal Medicine) Physician Overview
How Haluk Tezcan, MD fits within the Hematology (Internal Medicine) Physician landscape nationally.
1,483
Hematology (Internal Medicine) Physician Providers in US
50
States with Hematology (Internal Medicine) Physician
684
Avg Claims per Provider
Haluk Tezcan, MD's 133 claims are below the specialty average of 684.
Nationwide Hematology (Internal Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Tezcan, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Hematology (Internal Medicine) Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Tezcan.
One of 132 Hematology (Internal Medicine) Physician providers enrolled in California, 5 are shown here.
Dr. Haifaa Abdulhaq
MD
Fresno, CA
Dr. John Adamson
MD
San Diego, CA
Dr. Julio Alvarenga Thiebaud
M.D.
Irvine, CA
Dr. Idoroenyi Amanam
M.D.
Duarte, CA
Dr. Ian Anderson
M.D.
Santa Rosa, CA
Compare Hematology (Internal Medicine) Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Haluk Tezcan, MD's specialty? ▼
Haluk Tezcan, MD specializes in Hematology (Internal Medicine) Physician and practices in Stanford, California. Credentials: MD.
How much does Haluk Tezcan, MD prescribe under Medicare Part D? ▼
In 2024, Haluk Tezcan, MD wrote 133 Medicare Part D claims totaling $170K in drug costs for 63 beneficiaries.
Where is Haluk Tezcan, MD located? ▼
Haluk Tezcan, MD is located at 300 PASTEUR DR, Stanford, CA, 94305. Phone: (650) 723-4000.
What is Haluk Tezcan, MD's NPI number? ▼
Haluk Tezcan, MD's National Provider Identifier (NPI) is 1487684148, issued on 07/05/2006.
Does Haluk Tezcan, MD prescribe more brand-name or generic drugs? ▼
Haluk Tezcan, MD's prescribing is 17% brand-name and 83% generic drugs by claim count, with $140K in brand drug costs.
How many Hematology (Internal Medicine) Physician providers are there in the US? ▼
There are 1,483 Hematology (Internal Medicine) Physician providers across 50 states in the US. The average Hematology (Internal Medicine) Physician provider writes 684 Medicare Part D claims per year.
What drugs does Haluk Tezcan, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Haluk Tezcan, MD's most frequently prescribed drugs include Tamoxifen Citrate, Anastrozole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Haluk Tezcan, MD accept Medicare? ▼
Haluk Tezcan, MD appears in CMS Medicare data with 133 Part D claims and 63 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Haluk Tezcan, MD's credentials? ▼
Haluk Tezcan, MD's NPI is 1487684148 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 (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.