NPI registry status
Active
2026 NPPES data Pain Medicine (Anesthesiology) Physician NPI 1538173950 M.D.
Verify on CMS → Christopher Chisholm, M.D.
Pain Medicine (Anesthesiology) Physician in Poway, 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 4,032 in Pain Medicine (Anesthesiology) 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
748
Medicare Part D claims · 88 beneficiaries · Pain Medicine (Anesthesiology) Physician avg: 2K
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$220.68
5 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Christopher Chisholm, M.D. filed 748 Medicare Part D claims in 2023 as a Pain Medicine (Anesthesiology) Physician in Poway, California, prescribing 92% generic.
- 748
- Part D claims, 2023
- 92%
- 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.
CMS NPPES provider registry desk
NPI 1538173950 · Pain Medicine (Anesthesiology) Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1538173950
- ENUM-LEGACY 2006
- TAX-NARROW 4,032
- RX-LIGHT 748
- BOOK-THIN 414 in California
- PHOTO-ENUM Michael Malizzo · 2006
Christopher Chisholm, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
748 ≥ 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)
Christopher Chisholm, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 2 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 Christopher Chisholm, M.D.?
Quality data not reportedPrimary specialty
Pain Medicine (Anesthesiology) Physician
Medicare Part D claims
748 55% vs specialty avg
Specialty distribution in California
How Pain Medicine (Anesthesiology) 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 Pain Medicine (Anesthesiology) 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 | 1538173950 |
|---|---|
| Specialty | Pain Medicine (Anesthesiology) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/28/2006 |
Hospital and facility affiliations
Facilities where Christopher Chisholm, 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.
Banner - University Hospital Based Physicians LLC
Phoenix, AZ
Zachary C Cohen MD Apc
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).
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 Christopher Chisholm, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$221
Largest payer
Medtronic, 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 Christopher Chisholm, M.D.. To verify Christopher Chisholm, 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 · Generic-heavy
Christopher Chisholm, M.D. - brand share 8.0%
Pain Medicine (Anesthesiology) Physician average
8% brand-name claims vs 92% generic, on 748 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.
748
Total Claims
$63K
Total Drug Cost
88
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 816
- Total Day Supply
- 22,263
- Brand vs Generic
- 8% brand / 92% generic
- Brand Drug Cost
- $41K
- Generic Drug Cost
- $22K
- Opioid Claims
- 479 (64.0% rate)
- Antibiotic Claims
- 15
Patient Demographics
- Average Patient Age
- 69.8 years
- Avg HCC Risk Score
- 1.75
- Gender Split
- 61% female / 39% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Christopher Chisholm, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
148 claims
- Oxycodone Hcl
Oxycodone Hcl
120 claims
- Morphine Sulfate Er
Morphine Sulfate Er
60 claims
- Oxycodone-Acetamin… 46
Oxycodone-Acetaminophen
46 claims
- Diazepam 45
Diazepam
45 claims
- Gabapentin 42
Gabapentin
42 claims
- Tizanidine Hcl 27
Tizanidine Hcl
27 claims
- Baclofen 26
Baclofen
26 claims
| Drug | Claims |
|---|---|
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 148 |
| Oxycodone Hcl | 120 |
| Morphine Sulfate Er Morphine Sulfate | 60 |
| Oxycodone-Acetaminophen Oxycodone Hcl/Acetaminophen | 46 |
| Diazepam | 45 |
| Gabapentin | 42 |
| Tizanidine Hcl | 27 |
| Baclofen | 26 |
| Pregabalin | 22 |
| Duloxetine Hcl | 19 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Pain Medicine (Anesthesiology) Physician in CA →
All providers in California →
Compare specialties →
Pain Medicine (Anesthesiology) Physician Overview
How Christopher Chisholm, M.D. fits within the Pain Medicine (Anesthesiology) Physician landscape nationally.
4,032
Pain Medicine (Anesthesiology) Physician Providers in US
53
States with Pain Medicine (Anesthesiology) Physician
1,657
Avg Claims per Provider
Christopher Chisholm, M.D.'s 748 claims are below the specialty average of 1,657.
Nationwide Pain Medicine (Anesthesiology) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Chisholm, 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 Pain Medicine (Anesthesiology) Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Chisholm.
One of 414 Pain Medicine (Anesthesiology) Physician providers enrolled in California, 5 are shown here.
Dr. Shahram Abbassi
MD
Arcata, CA
Dr. Chris Abrecht
M.D.
San Francisco, CA
Dr. Rishi Agarwal
M.D.
Pasadena, CA
Dr. Bashar Ahmed
M.D.
Santa Rosa, CA
Dr. Jane Ahn
M.D.
Stanford, CA
Compare Pain Medicine (Anesthesiology) Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Christopher Chisholm, M.D.'s specialty? ▼
Christopher Chisholm, M.D. specializes in Pain Medicine (Anesthesiology) Physician and practices in Poway, California. Credentials: M.D..
How much does Christopher Chisholm, M.D. prescribe under Medicare Part D? ▼
In 2023, Christopher Chisholm, M.D. wrote 748 Medicare Part D claims totaling $63K in drug costs for 88 beneficiaries.
Where is Christopher Chisholm, M.D. located? ▼
Christopher Chisholm, M.D. is located at 15725 POMERADO RD, Poway, CA, 92064. Phone: (858) 453-7700.
What is Christopher Chisholm, M.D.'s NPI number? ▼
Christopher Chisholm, M.D.'s National Provider Identifier (NPI) is 1538173950, issued on 07/28/2006.
Does Christopher Chisholm, M.D. prescribe more brand-name or generic drugs? ▼
Christopher Chisholm, M.D.'s prescribing is 8% brand-name and 92% generic drugs by claim count, with $41K in brand drug costs.
Does Christopher Chisholm, M.D. prescribe opioids? ▼
Yes, Christopher Chisholm, M.D. had 479 opioid claims in 2023 with an opioid prescribing rate of 64.0%.
How many Pain Medicine (Anesthesiology) Physician providers are there in the US? ▼
There are 4,032 Pain Medicine (Anesthesiology) Physician providers across 53 states in the US. The average Pain Medicine (Anesthesiology) Physician provider writes 1,657 Medicare Part D claims per year.
What drugs does Christopher Chisholm, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Christopher Chisholm, M.D.'s most frequently prescribed drugs include Hydrocodone-Acetaminophen, Oxycodone Hcl, Morphine Sulfate Er. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Christopher Chisholm, M.D. accept Medicare? ▼
Christopher Chisholm, M.D. appears in CMS Medicare data with 748 Part D claims and 88 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Christopher Chisholm, M.D.'s credentials? ▼
Christopher Chisholm, M.D.'s NPI is 1538173950 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.