NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1124176177 MD
Verify on CMS → James Nitahara, MD
Internal Medicine Physician in Panorama City, 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 172,737 in 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
10K
Medicare Part D claims · 894 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
90%
generic claims · 9% 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 Nitahara, MD filed 9,975 Medicare Part D claims in 2023 as an Internal Medicine Physician in Panorama City, California, prescribing 90% generic.
- 10K
- Part D claims, 2023
- 90%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥98th
- 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.
CMS NPPES provider registry desk
NPI 1124176177 · Internal Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · RX-MID · BOOK-MID · PHOTO-ENUM
- NPI-10 1124176177
- ENUM-MID 2007
- TAX-MEGA 173K Internal Medicine
- RX-MID 9,975
- BOOK-MID 20,046 in California
- PHOTO-ENUM Renee Berna · 2007
James Nitahara, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
9,975 ≥ 98th percentile 98% 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 Nitahara, 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 Nitahara, MD?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
9,975 267% vs specialty avg
Specialty distribution in California
How 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 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 | 1124176177 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 01/08/2007 |
Hospital and facility affiliations
Facilities where James Nitahara, 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.
Southern California Permanente Medical Group
Panorama City, 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 Nitahara, MD. To verify James Nitahara, 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 Nitahara, MD - brand share 9.0%
Internal Medicine Physician average
9% brand-name claims vs 90% generic, on 9,975 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.
9,975
Total Claims
$530K
Total Drug Cost
894
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 27,379
- Total Day Supply
- 810,608
- Brand vs Generic
- 9% brand / 90% generic
- Brand Drug Cost
- $370K
- Generic Drug Cost
- $157K
- Opioid Claims
- 268 (2.7% rate)
- Antibiotic Claims
- 95
Patient Demographics
- Average Patient Age
- 75.7 years
- Avg HCC Risk Score
- 1.26
- Gender Split
- 47% female / 53% male
- Age Distribution
- <65: 33, 65-74: 389, 75-84: 326, 85+: 146
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What James Nitahara, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
981 claims
- Amlodipine Besylate
Amlodipine Besylate
717 claims
- Lisinopril
Lisinopril
538 claims
- Metformin Hcl 382
Metformin Hcl
382 claims
- Rosuvastatin Calcium 344
Rosuvastatin Calcium
344 claims
- Atenolol 326
Atenolol
326 claims
- Simvastatin 310
Simvastatin
310 claims
- Levothyroxine Sodium 300
Levothyroxine Sodium
300 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 981 |
| Amlodipine Besylate | 717 |
| Lisinopril | 538 |
| Metformin Hcl | 382 |
| Rosuvastatin Calcium | 344 |
| Atenolol | 326 |
| Simvastatin | 310 |
| Levothyroxine Sodium | 300 |
| Losartan Potassium | 300 |
| Omeprazole | 266 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How James Nitahara, MD fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
James Nitahara, MD's 9,975 claims are above the specialty average of 2,716.
Nationwide Internal Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Nitahara, 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 Internal Medicine Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Nitahara.
One of 20,046 Internal Medicine Physician providers enrolled in California, 5 are shown here.
Dr. Jacob Aaron
MD
San Francisco, CA
Dr. Alistair Aaronson
MD
Stanford, CA
Dr. Jose Abad.
MD
Sacramento, CA
Dr. Donna Abare
MD
Oakland, CA
Marce Abare
Scotts Valley, CA
Compare Internal Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is James Nitahara, MD's specialty? ▼
James Nitahara, MD specializes in Internal Medicine Physician and practices in Panorama City, California. Credentials: MD.
How much does James Nitahara, MD prescribe under Medicare Part D? ▼
In 2023, James Nitahara, MD wrote 9,975 Medicare Part D claims totaling $530K in drug costs for 894 beneficiaries.
Where is James Nitahara, MD located? ▼
James Nitahara, MD is located at 13652 CANTARA ST, Panorama City, CA, 91402. Phone: (818) 375-2000.
What is James Nitahara, MD's NPI number? ▼
James Nitahara, MD's National Provider Identifier (NPI) is 1124176177, issued on 01/08/2007.
Does James Nitahara, MD prescribe more brand-name or generic drugs? ▼
James Nitahara, MD's prescribing is 9% brand-name and 90% generic drugs by claim count, with $370K in brand drug costs.
Does James Nitahara, MD prescribe opioids? ▼
Yes, James Nitahara, MD had 268 opioid claims in 2023 with an opioid prescribing rate of 2.7%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does James Nitahara, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, James Nitahara, MD's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does James Nitahara, MD accept Medicare? ▼
James Nitahara, MD appears in CMS Medicare data with 9,975 Part D claims and 894 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify James Nitahara, MD's credentials? ▼
James Nitahara, MD's NPI is 1124176177 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.