NPI registry status
Active
2026 NPPES data Undersea and Hyperbaric Medicine (Emergency Medicine) Physician NPI 1841221645 MD
Verify on CMS → James Killeen, MD
Undersea and Hyperbaric Medicine (Emergency Medicine) Physician in San Diego, 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 202 in Undersea and Hyperbaric Medicine (Emergency 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
357
Medicare Part D claims · 245 beneficiaries · Undersea and Hyperbaric Medicine (Emergency Medicine) Physician avg: 367
Generic prescribing
91%
generic claims · 5% 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
James Killeen, MD filed 357 Medicare Part D claims in 2023 as an Undersea and Hyperbaric Medicine (Emergency Medicine) Physician in San Diego, California, prescribing 91% generic.
- 357
- Part D claims, 2023
- 91%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥57th
- 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.
James Killeen, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
357 ≥ 57th percentile 57% 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)
James Killeen, MD 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 James Killeen, MD?
Quality data not reportedPrimary specialty
Undersea and Hyperbaric Medicine (Emergency Medicine) Physician
Medicare Part D claims
357 3% vs specialty avg
Specialty distribution in California
How Undersea and Hyperbaric Medicine (Emergency 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 Undersea and Hyperbaric Medicine (Emergency 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).
James Killeen, MD appears in the CMS NPPES registry as an Undersea and Hyperbaric Medicine (Emergency Medicine) Physician provider holding MD credentials at 200 W ARBOR DR, San Diego, CA, 92103, with a listed phone of (800) 926-8273. NPI 1841221645 was issued on 07/06/2006.
Medicare Part D records for calendar year 2023 show 357 prescription claims written by this provider, covering 245 Medicare beneficiaries and totaling roughly $7K in drug spend, split 5% brand-name and 91% generic by claim count.
Undersea and Hyperbaric Medicine (Emergency Medicine) Physician is a narrow specialty nationwide, with 202 enrolled providers across 43 states and an average of 367 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 | 1841221645 |
|---|---|
| Specialty | Undersea and Hyperbaric Medicine (Emergency Medicine) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 07/06/2006 |
Hospital and facility affiliations
Facilities where James Killeen, 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.
Regents OF The University OF California
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 James Killeen, MD. To verify James Killeen, 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 · Generic-heavy
James Killeen, MD - brand share 5.0%
Undersea and Hyperbaric Medicine (Emergency Medicine) Physician average
5% brand-name claims vs 91% generic, on 357 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.
357
Total Claims
$7K
Total Drug Cost
245
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 360
- Total Day Supply
- 3,657
- Brand vs Generic
- 5% brand / 91% generic
- Brand Drug Cost
- $2K
- Generic Drug Cost
- $5K
- Antibiotic Claims
- 149
Patient Demographics
- Average Patient Age
- 73.1 years
- Avg HCC Risk Score
- 1.32
- Gender Split
- 62% female / 38% male
- Age Distribution
- <65: 27, 65-74: 104, 75-84: 87, 85+: 27
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What James Killeen, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Methylprednisolone
Methylprednisolone
76 claims
- Cephalexin
Cephalexin
47 claims
- Azithromycin
Azithromycin
45 claims
- Albuterol Sulfate … 15
Albuterol Sulfate Hfa
15 claims
- Paxlovid (Eua) 12
Paxlovid (Eua)
12 claims
- Prednisone 12
Prednisone
12 claims
- Moxifloxacin Hcl 11
Moxifloxacin Hcl
11 claims
| Drug | Claims |
|---|---|
| Methylprednisolone | 76 |
| Cephalexin | 47 |
| Azithromycin | 45 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 15 |
| Paxlovid (Eua) Nirmatrelvir/Ritonavir | 12 |
| Prednisone | 12 |
| Moxifloxacin Hcl | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Undersea and Hyperbaric Medicine (Emergency Medicine) Physician in CA →
All providers in California →
Compare specialties →
Undersea and Hyperbaric Medicine (Emergency Medicine) Physician Overview
How James Killeen, MD fits within the Undersea and Hyperbaric Medicine (Emergency Medicine) Physician landscape nationally.
202
Undersea and Hyperbaric Medicine (Emergency Medicine) Physician Providers in US
43
States with Undersea and Hyperbaric Medicine (Emergency Medicine) Physician
367
Avg Claims per Provider
James Killeen, MD's 357 claims are below the specialty average of 367.
Nearby Undersea and Hyperbaric Medicine (Emergency Medicine) Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Killeen.
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 Undersea and Hyperbaric Medicine (Emergency 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 James Killeen, MD's specialty? ▼
James Killeen, MD specializes in Undersea and Hyperbaric Medicine (Emergency Medicine) Physician and practices in San Diego, California. Credentials: MD.
How much does James Killeen, MD prescribe under Medicare Part D? ▼
In 2023, James Killeen, MD wrote 357 Medicare Part D claims totaling $7K in drug costs for 245 beneficiaries.
Where is James Killeen, MD located? ▼
James Killeen, MD is located at 200 W ARBOR DR, San Diego, CA, 92103. Phone: (800) 926-8273.
What is James Killeen, MD's NPI number? ▼
James Killeen, MD's National Provider Identifier (NPI) is 1841221645, issued on 07/06/2006.
Does James Killeen, MD prescribe more brand-name or generic drugs? ▼
James Killeen, MD's prescribing is 5% brand-name and 91% generic drugs by claim count, with $2K in brand drug costs.
How many Undersea and Hyperbaric Medicine (Emergency Medicine) Physician providers are there in the US? ▼
There are 202 Undersea and Hyperbaric Medicine (Emergency Medicine) Physician providers across 43 states in the US. The average Undersea and Hyperbaric Medicine (Emergency Medicine) Physician provider writes 367 Medicare Part D claims per year.
What drugs does James Killeen, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, James Killeen, MD's most frequently prescribed drugs include Methylprednisolone, Cephalexin, Azithromycin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does James Killeen, MD accept Medicare? ▼
James Killeen, MD appears in CMS Medicare data with 357 Part D claims and 245 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify James Killeen, MD's credentials? ▼
James Killeen, MD's NPI is 1841221645 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.
- 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.