NPI registry status
Active
2026 NPPES data Emergency Medicine Physician NPI 1558456715 MD
Verify on CMS → Marshall Saiz, MD
Emergency Medicine Physician in Albuquerque, New Mexico.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 66,293 in 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
401
Medicare Part D claims · 361 beneficiaries · Emergency Medicine Physician avg: 355
Generic prescribing
96%
generic claims · 4% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Marshall Saiz, MD filed 401 Medicare Part D claims in 2024 as an Emergency Medicine Physician in Albuquerque, New Mexico, prescribing 96% generic.
- 401
- Part D claims, 2024
- 96%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥61st
- 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.
Federal trust snapshot
What official records show about Marshall Saiz, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1558456715), first enumerated 10/04/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 401 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
Compare Saiz with other Emergency Medicine Physician providers
Same primary specialty, same federal CMS NPPES roster.
All 261 Emergency Medicine Physician providers in Albuquerque, NM →
Also enrolled in New Mexico
- Dr. Jaime Aagaard, MD Albuquerque, NM
- Dr. Dawn Abriel, DO Santa Fe, NM
- Dr. Steven Acosta, M.D. Las Cruces, NM
- Dr. Irene Agostini, MD Albuquerque, NM
- Dr. Bassam Al Homsi, MD Deming, NM
- Dr. Bette Allen, M.D. Albuquerque, NM
Other specialties in Albuquerque: Behavior Technician (2,198) · Student in an Organized Health Care Education/Training Program (1,628) · Mental Health Counselor (1,151) · Case Manager/Care Coordinator (977)
CMS NPPES provider registry desk
NPI 1558456715 · Emergency Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1558456715
- ENUM-LEGACY 2006
- TAX-MEGA 66K Emergency Medicine
- RX-LIGHT 401
- BOOK-THIN 472 in New Mexico
- PHOTO-ENUM John Davis, MD · 2006
Marshall Saiz, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
401 ≥ 61st percentile 61% of 1,416,883 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 · 2024
✓
Board certification likely (heuristic, not verified)
Marshall Saiz, 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 Marshall Saiz, MD?
Quality data not reportedPrimary specialty
Emergency Medicine Physician
Medicare Part D claims
401 13% vs specialty avg
Specialty distribution in New Mexico
How Emergency Medicine Physician compares to other specialties among New Mexico 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 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).
Practice Address
Provider Details
| NPI | 1558456715 |
|---|---|
| Specialty | Emergency Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/04/2006 |
Hospital and facility affiliations
Facilities where Marshall Saiz, 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.
Permanente Medical Group Inc
Modesto, 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).
Brand vs generic prescribing mix · Generic-heavy
Marshall Saiz, MD - brand share 4.0%
Emergency Medicine Physician average
4% brand-name claims vs 96% generic, on 401 2024 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 2024.
401
Total Claims
$6K
Total Drug Cost
361
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 406.333
- Total Day Supply
- 4,442
- Brand vs Generic
- 4% brand / 96% generic
- Brand Drug Cost
- $532
- Generic Drug Cost
- $5K
- Antibiotic Claims
- 192
Patient Demographics
- Average Patient Age
- 73.0 years
- Avg HCC Risk Score
- 1.45
- Gender Split
- 66% female / 34% male
- Age Distribution
- <65: 46, 65-74: 152, 75-84: 120, 85+: 43
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Marshall Saiz, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Ofloxacin
Ofloxacin
51 claims
- Ciprofloxacin Hcl
Ciprofloxacin Hcl
34 claims
- Polymyxin B Sul-Tr…
Polymyxin B Sul-Trimethoprim
33 claims
- Cefpodoxime Proxetil
Cefpodoxime Proxetil
30 claims
- Fluconazole
Fluconazole
25 claims
- Nitrofurantoin Mon…
Nitrofurantoin Mono-Macro
25 claims
- Ondansetron Odt
Ondansetron Odt
23 claims
- Amoxicillin
Amoxicillin
21 claims
| Drug | Claims |
|---|---|
| Ofloxacin | 51 |
| Ciprofloxacin Hcl | 34 |
| Polymyxin B Sul-Trimethoprim Polymyxin B Sulf/Trimethoprim | 33 |
| Cefpodoxime Proxetil | 30 |
| Fluconazole | 25 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 25 |
| Ondansetron Odt Ondansetron | 23 |
| Amoxicillin | 21 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 19 |
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Emergency Medicine Physician Overview
How Marshall Saiz, MD fits within the Emergency Medicine Physician landscape nationally.
66,293
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
355
Avg Claims per Provider
Marshall Saiz, MD's 401 claims are above the specialty average of 355.
Nationwide Emergency Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Saiz, both outside New Mexico 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 Emergency Medicine Physician Providers in New Mexico
Other clinicians with the same primary specialty enrolled in New Mexico, drawn from the same CMS NPPES roster as Saiz.
One of 472 Emergency Medicine Physician providers enrolled in New Mexico, 11 are shown on this page.
Robert Alunday
Albuquerque, NM
Dr. Catherine Ambrose
MD
Farmington, NM
Erik Anderson
Albuquerque, NM
Dr. Lee Anderson
MD
Santa Fe, NM
William Aragon
Albuquerque, NM
Compare Emergency Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Marshall Saiz, MD's specialty? ▼
Marshall Saiz, MD specializes in Emergency Medicine Physician and practices in Albuquerque, New Mexico. Credentials: MD.
How much does Marshall Saiz, MD prescribe under Medicare Part D? ▼
In 2024, Marshall Saiz, MD wrote 401 Medicare Part D claims totaling $6K in drug costs for 361 beneficiaries.
Where is Marshall Saiz, MD located? ▼
Marshall Saiz, MD is located at 1115 CENTRAL AVE NE, Albuquerque, NM, 87106. Phone: (505) 823-8233.
What is Marshall Saiz, MD's NPI number? ▼
Marshall Saiz, MD's National Provider Identifier (NPI) is 1558456715, issued on 10/04/2006.
Does Marshall Saiz, MD prescribe more brand-name or generic drugs? ▼
Marshall Saiz, MD's prescribing is 4% brand-name and 96% generic drugs by claim count, with $532 in brand drug costs.
How many Emergency Medicine Physician providers are there in the US? ▼
There are 66,293 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 355 Medicare Part D claims per year.
What drugs does Marshall Saiz, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Marshall Saiz, MD's most frequently prescribed drugs include Ofloxacin, Ciprofloxacin Hcl, Polymyxin B Sul-Trimethoprim. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Marshall Saiz, MD accept Medicare? ▼
Marshall Saiz, MD appears in CMS Medicare data with 401 Part D claims and 361 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Marshall Saiz, MD's credentials? ▼
Marshall Saiz, MD's NPI is 1558456715 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.