NPI registry status
Active
2026 NPPES data Sleep Medicine (Internal Medicine) Physician NPI 1942288709 M.D.
Verify on CMS → Bruce Tammelin, M.D.
Sleep Medicine (Internal Medicine) Physician in Mission Viejo, 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 859 in Sleep Medicine (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
763
Medicare Part D claims · 137 beneficiaries · Sleep Medicine (Internal Medicine) Physician avg: 1K
Generic prescribing
51%
generic claims · 49% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.0K
34 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Bruce Tammelin, M.D. filed 763 Medicare Part D claims in 2023 as a Sleep Medicine (Internal Medicine) Physician in Mission Viejo, California, prescribing 51% generic.
- 763
- Part D claims, 2023
- 51%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥71st
- 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.
Bruce Tammelin, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
763 ≥ 71st percentile 71% 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
✓
Board certification likely (heuristic, not verified)
Bruce Tammelin, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - 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 Bruce Tammelin, M.D.?
Quality data not reportedPrimary specialty
Sleep Medicine (Internal Medicine) Physician
Medicare Part D claims
763 42% vs specialty avg
Specialty distribution in California
How Sleep Medicine (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 Sleep Medicine (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).
Bruce Tammelin, M.D. appears in the CMS NPPES registry as a Sleep Medicine (Internal Medicine) Physician provider holding M.D. credentials at 26800 CROWN VALLEY PKWY, Mission Viejo, CA, 92691, with a listed phone of (949) 364-3330. NPI 1942288709 was issued on 01/03/2006.
Medicare Part D records for calendar year 2023 show 763 prescription claims written by this provider, covering 137 Medicare beneficiaries and totaling roughly $673K in drug spend, split 49% brand-name and 51% generic by claim count.
Sleep Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 859 enrolled providers across 52 states and an average of 1,310 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 | 1942288709 |
|---|---|
| Specialty | Sleep Medicine (Internal Medicine) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 01/03/2006 |
Hospital and facility affiliations
Facilities where Bruce Tammelin, M.D. 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.
Providence Medical Foundation
Orange, 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).
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 Bruce Tammelin, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$1.0K
Largest payer
JAZZ PHARMACEUTICALS 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 Bruce Tammelin, M.D.. To verify Bruce Tammelin, M.D.'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 · Above average
Bruce Tammelin, M.D. - brand share 49.0%
Sleep Medicine (Internal Medicine) Physician average
49% brand-name claims vs 51% generic, on 763 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.
763
Total Claims
$673K
Total Drug Cost
137
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,374
- Total Day Supply
- 38,434
- Brand vs Generic
- 49% brand / 51% generic
- Brand Drug Cost
- $661K
- Generic Drug Cost
- $12K
- Antibiotic Claims
- 85
Patient Demographics
- Average Patient Age
- 76.6 years
- Avg HCC Risk Score
- 1.67
- Gender Split
- 57% female / 43% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Bruce Tammelin, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Albuterol Sulfate …
Albuterol Sulfate Hfa
94 claims
- Montelukast Sodium
Montelukast Sodium
72 claims
- Symbicort
Symbicort
50 claims
- Trelegy Ellipta
Trelegy Ellipta
47 claims
- Azithromycin
Azithromycin
43 claims
- Breo Ellipta
Breo Ellipta
39 claims
- Gammagard Liquid 31
Gammagard Liquid
31 claims
- Prednisone 29
Prednisone
29 claims
| Drug | Claims |
|---|---|
| Albuterol Sulfate Hfa Albuterol Sulfate | 94 |
| Montelukast Sodium | 72 |
| Symbicort Budesonide/Formoterol Fumarate | 50 |
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 47 |
| Azithromycin | 43 |
| Breo Ellipta Fluticasone/Vilanterol | 39 |
| Gammagard Liquid Immun Glob G(Igg)/Gly/Iga Ov50 | 31 |
| Prednisone | 29 |
| Armodafinil | 26 |
| Omeprazole | 23 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Sleep Medicine (Internal Medicine) Physician in CA →
All providers in California →
Compare specialties →
Sleep Medicine (Internal Medicine) Physician Overview
How Bruce Tammelin, M.D. fits within the Sleep Medicine (Internal Medicine) Physician landscape nationally.
859
Sleep Medicine (Internal Medicine) Physician Providers in US
52
States with Sleep Medicine (Internal Medicine) Physician
1,310
Avg Claims per Provider
Bruce Tammelin, M.D.'s 763 claims are below the specialty average of 1,310.
Nearby Sleep Medicine (Internal Medicine) Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Tammelin.
Dr. Jennifer Acostamadiedo
MD
Santa Cruz, CA
Kathreen Al Ramo
Fresno, CA
Dr. Amir Arfaei
MD
Ventura, CA
Dr. Hovig Artinian
M.D.
Clovis, CA
Dr. Aditya Bhargava
M.D.
Dublin, CA
Compare Sleep Medicine (Internal Medicine) 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 Sleep Medicine (Internal Medicine) 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 Bruce Tammelin, M.D.'s specialty? ▼
Bruce Tammelin, M.D. specializes in Sleep Medicine (Internal Medicine) Physician and practices in Mission Viejo, California. Credentials: M.D..
How much does Bruce Tammelin, M.D. prescribe under Medicare Part D? ▼
In 2023, Bruce Tammelin, M.D. wrote 763 Medicare Part D claims totaling $673K in drug costs for 137 beneficiaries.
Where is Bruce Tammelin, M.D. located? ▼
Bruce Tammelin, M.D. is located at 26800 CROWN VALLEY PKWY, Mission Viejo, CA, 92691. Phone: (949) 364-3330.
What is Bruce Tammelin, M.D.'s NPI number? ▼
Bruce Tammelin, M.D.'s National Provider Identifier (NPI) is 1942288709, issued on 01/03/2006.
Does Bruce Tammelin, M.D. prescribe more brand-name or generic drugs? ▼
Bruce Tammelin, M.D.'s prescribing is 49% brand-name and 51% generic drugs by claim count, with $661K in brand drug costs.
How many Sleep Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 859 Sleep Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Sleep Medicine (Internal Medicine) Physician provider writes 1,310 Medicare Part D claims per year.
What drugs does Bruce Tammelin, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Bruce Tammelin, M.D.'s most frequently prescribed drugs include Albuterol Sulfate Hfa, Montelukast Sodium, Symbicort. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Bruce Tammelin, M.D. accept Medicare? ▼
Bruce Tammelin, M.D. appears in CMS Medicare data with 763 Part D claims and 137 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Bruce Tammelin, M.D.'s credentials? ▼
Bruce Tammelin, M.D.'s NPI is 1942288709 with credentials M.D.. 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.