NPI registry status
Active
2026 NPPES data Behavioral Neurology & Neuropsychiatry Physician NPI 1538593165 MD
Verify on CMS → Sandra Combs, MD
Behavioral Neurology & Neuropsychiatry Physician in Tucson, Arizona.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 271 in Behavioral Neurology & Neuropsychiatry 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
517
Medicare Part D claims · 63 beneficiaries · Behavioral Neurology & Neuropsychiatry Physician avg: 804
Generic prescribing
97%
generic claims · 3% 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
Sandra Combs, MD filed 517 Medicare Part D claims in 2023 as a Behavioral Neurology & Neuropsychiatry Physician in Tucson, Arizona, prescribing 97% generic.
- 517
- Part D claims, 2023
- 97%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥66th
- 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.
Sandra Combs, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
517 ≥ 66th percentile 66% 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)
Sandra Combs, 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 Sandra Combs, MD?
Quality data not reportedPrimary specialty
Behavioral Neurology & Neuropsychiatry Physician
Medicare Part D claims
517 36% vs specialty avg
Specialty distribution in Arizona
How Behavioral Neurology & Neuropsychiatry Physician compares to other specialties among Arizona 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 Behavioral Neurology & Neuropsychiatry 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).
Sandra Combs, MD appears in the CMS NPPES registry as a Behavioral Neurology & Neuropsychiatry Physician provider holding MD credentials at 839 W CONGRESS ST, Tucson, AZ, 85745, with a listed phone of (520) 670-3909. NPI 1538593165 was issued on 08/30/2013.
Medicare Part D records for calendar year 2023 show 517 prescription claims written by this provider, covering 63 Medicare beneficiaries and totaling roughly $36K in drug spend, split 3% brand-name and 97% generic by claim count.
Behavioral Neurology & Neuropsychiatry Physician is a narrow specialty nationwide, with 271 enrolled providers across 43 states and an average of 804 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 | 1538593165 |
|---|---|
| Specialty | Behavioral Neurology & Neuropsychiatry Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 08/30/2013 |
Hospital and facility affiliations
Facilities where Sandra Combs, 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.
EL Rio Santa Cruz Neighborhood Health Center Inc
Tucson, AZ
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Generic-heavy
Sandra Combs, MD - brand share 3.0%
Behavioral Neurology & Neuropsychiatry Physician average
3% brand-name claims vs 97% generic, on 517 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.
517
Total Claims
$36K
Total Drug Cost
63
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,179
- Total Day Supply
- 35,161
- Brand vs Generic
- 3% brand / 97% generic
- Brand Drug Cost
- $10K
- Generic Drug Cost
- $26K
Patient Demographics
- Average Patient Age
- 63.7 years
- Avg HCC Risk Score
- 1.11
- Gender Split
- 68% female / 32% male
- Age Distribution
- <65: 29, 65-74: 26, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Sandra Combs, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Lamotrigine
Lamotrigine
47 claims
- Mirtazapine
Mirtazapine
47 claims
- Duloxetine Hcl
Duloxetine Hcl
38 claims
- Fluoxetine Hcl
Fluoxetine Hcl
38 claims
- Bupropion Xl
Bupropion Xl
31 claims
- Trazodone Hcl
Trazodone Hcl
31 claims
- Aripiprazole
Aripiprazole
24 claims
- Venlafaxine Hcl Er
Venlafaxine Hcl Er
22 claims
| Drug | Claims |
|---|---|
| Lamotrigine | 47 |
| Mirtazapine | 47 |
| Duloxetine Hcl | 38 |
| Fluoxetine Hcl | 38 |
| Bupropion Xl Bupropion Hcl | 31 |
| Trazodone Hcl | 31 |
| Aripiprazole | 24 |
| Venlafaxine Hcl Er Venlafaxine Hcl | 22 |
| Escitalopram Oxalate | 19 |
| Gabapentin | 19 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Behavioral Neurology & Neuropsychiatry Physician in AZ →
All providers in Arizona →
Compare specialties →
Behavioral Neurology & Neuropsychiatry Physician Overview
How Sandra Combs, MD fits within the Behavioral Neurology & Neuropsychiatry Physician landscape nationally.
271
Behavioral Neurology & Neuropsychiatry Physician Providers in US
43
States with Behavioral Neurology & Neuropsychiatry Physician
804
Avg Claims per Provider
Sandra Combs, MD's 517 claims are below the specialty average of 804.
Nearby Behavioral Neurology & Neuropsychiatry Physician Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Combs.
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 Arizona medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Behavioral Neurology & Neuropsychiatry 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 Sandra Combs, MD's specialty? ▼
Sandra Combs, MD specializes in Behavioral Neurology & Neuropsychiatry Physician and practices in Tucson, Arizona. Credentials: MD.
How much does Sandra Combs, MD prescribe under Medicare Part D? ▼
In 2023, Sandra Combs, MD wrote 517 Medicare Part D claims totaling $36K in drug costs for 63 beneficiaries.
Where is Sandra Combs, MD located? ▼
Sandra Combs, MD is located at 839 W CONGRESS ST, Tucson, AZ, 85745. Phone: (520) 670-3909.
What is Sandra Combs, MD's NPI number? ▼
Sandra Combs, MD's National Provider Identifier (NPI) is 1538593165, issued on 08/30/2013.
Does Sandra Combs, MD prescribe more brand-name or generic drugs? ▼
Sandra Combs, MD's prescribing is 3% brand-name and 97% generic drugs by claim count, with $10K in brand drug costs.
How many Behavioral Neurology & Neuropsychiatry Physician providers are there in the US? ▼
There are 271 Behavioral Neurology & Neuropsychiatry Physician providers across 43 states in the US. The average Behavioral Neurology & Neuropsychiatry Physician provider writes 804 Medicare Part D claims per year.
What drugs does Sandra Combs, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Sandra Combs, MD's most frequently prescribed drugs include Lamotrigine, Mirtazapine, Duloxetine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Sandra Combs, MD accept Medicare? ▼
Sandra Combs, MD appears in CMS Medicare data with 517 Part D claims and 63 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Sandra Combs, MD's credentials? ▼
Sandra Combs, MD's NPI is 1538593165 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.