NPI registry status
Active
2026 NPPES data Diagnostic Radiology Physician NPI 1114457769 MD
Verify on CMS → Crystal Azu, MD
Diagnostic Radiology Physician in Saint Louis, Missouri.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 40,433 in Diagnostic Radiology 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
405
Medicare Part D claims · 99 beneficiaries · Diagnostic Radiology Physician avg: 68
Generic prescribing
84%
generic claims · 16% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$291.03
2 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Crystal Azu, MD filed 405 Medicare Part D claims in 2024 as a Diagnostic Radiology Physician in Saint Louis, Missouri, prescribing 84% generic.
- 405
- Part D claims, 2024
- 84%
- 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 Crystal Azu, 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 1114457769), first enumerated 06/15/2017.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 405 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
- Reported
Industry payment transparency
$291.03 in reported industry payments (2 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- 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.
CMS NPPES provider registry desk
NPI 1114457769 · Diagnostic Radiology Physician
NPI-10 · ENUM-RECENT · TAX-MID · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1114457769
- ENUM-RECENT 2017
- TAX-MID 40K Diagnostic Radiology
- RX-LIGHT 405
- BOOK-LIGHT 945 in Missouri
- PHOTO-ENUM Simer Grewal, M.D. · 2017
Crystal Azu, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
405 ≥ 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)
Crystal Azu, 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 Crystal Azu, MD?
Quality data not reportedPrimary specialty
Diagnostic Radiology Physician
Medicare Part D claims
405 6× vs specialty avg
Specialty distribution in Missouri
How Diagnostic Radiology Physician compares to other specialties among Missouri 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 Diagnostic Radiology 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 | 1114457769 |
|---|---|
| Specialty | Diagnostic Radiology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 06/15/2017 |
Hospital and facility affiliations
Facilities where Crystal Azu, 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.
Washington University
Saint Louis, MO
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 Crystal Azu, MD. Source: openpaymentsdata.cms.gov.
Total received
$291
Largest payer
Abbott Laboratories
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.
Brand vs generic prescribing mix · Typical
Crystal Azu, MD - brand share 16.0%
Diagnostic Radiology Physician average
16% brand-name claims vs 84% generic, on 405 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.
405
Total Claims
$68K
Total Drug Cost
99
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 924.433
- Total Day Supply
- 27,516
- Brand vs Generic
- 16% brand / 84% generic
- Brand Drug Cost
- $62K
- Generic Drug Cost
- $6K
Patient Demographics
- Average Patient Age
- 72.3 years
- Avg HCC Risk Score
- 2.63
- Gender Split
- 58% female / 42% male
- Age Distribution
- <65: 13, 65-74: 47, 75-84: 28, 85+: 11
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Crystal Azu, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Metoprolol Succinate
Metoprolol Succinate
63 claims
- Atorvastatin Calcium
Atorvastatin Calcium
46 claims
- Furosemide
Furosemide
29 claims
- Spironolactone
Spironolactone
26 claims
- Ezetimibe 23
Ezetimibe
23 claims
- Entresto 21
Entresto
21 claims
- Olmesartan Medoxomil 19
Olmesartan Medoxomil
19 claims
- Losartan Potassium 16
Losartan Potassium
16 claims
| Drug | Claims |
|---|---|
| Metoprolol Succinate | 63 |
| Atorvastatin Calcium | 46 |
| Furosemide | 29 |
| Spironolactone | 26 |
| Ezetimibe | 23 |
| Entresto Sacubitril/Valsartan | 21 |
| Olmesartan Medoxomil | 19 |
| Losartan Potassium | 16 |
| Rosuvastatin Calcium | 14 |
| Amlodipine Besylate | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Diagnostic Radiology Physician Overview
How Crystal Azu, MD fits within the Diagnostic Radiology Physician landscape nationally.
40,433
Diagnostic Radiology Physician Providers in US
56
States with Diagnostic Radiology Physician
68
Avg Claims per Provider
Crystal Azu, MD's 405 claims are above the specialty average of 68.
Nationwide Diagnostic Radiology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Azu, both outside Missouri so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2017)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Diagnostic Radiology Physician Providers in Missouri
Other clinicians with the same primary specialty enrolled in Missouri, drawn from the same CMS NPPES roster as Azu.
One of 945 Diagnostic Radiology Physician providers enrolled in Missouri, 5 are shown here.
Dr. Mohammed Abbas
M.D.
Fenton, MO
Dr. Archana Abhyankar
MD
Chesterfield, MO
Dr. Daniel Abodeely
M.D.
Saint Louis, MO
Dr. Shepherd Abrams
M.D.
Saint Louis, MO
Dr. Natasha Acosta
MD
Kansas City, MO
Compare Diagnostic Radiology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Crystal Azu, MD's specialty? ▼
Crystal Azu, MD specializes in Diagnostic Radiology Physician and practices in Saint Louis, Missouri. Credentials: MD.
How much does Crystal Azu, MD prescribe under Medicare Part D? ▼
In 2024, Crystal Azu, MD wrote 405 Medicare Part D claims totaling $68K in drug costs for 99 beneficiaries.
Where is Crystal Azu, MD located? ▼
Crystal Azu, MD is located at 4921 PARKVIEW PL, Saint Louis, MO, 63110. Phone: (314) 362-1291.
What is Crystal Azu, MD's NPI number? ▼
Crystal Azu, MD's National Provider Identifier (NPI) is 1114457769, issued on 06/15/2017.
Does Crystal Azu, MD prescribe more brand-name or generic drugs? ▼
Crystal Azu, MD's prescribing is 16% brand-name and 84% generic drugs by claim count, with $62K in brand drug costs.
How many Diagnostic Radiology Physician providers are there in the US? ▼
There are 40,433 Diagnostic Radiology Physician providers across 56 states in the US. The average Diagnostic Radiology Physician provider writes 68 Medicare Part D claims per year.
What drugs does Crystal Azu, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Crystal Azu, MD's most frequently prescribed drugs include Metoprolol Succinate, Atorvastatin Calcium, Furosemide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Crystal Azu, MD accept Medicare? ▼
Crystal Azu, MD appears in CMS Medicare data with 405 Part D claims and 99 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Crystal Azu, MD's credentials? ▼
Crystal Azu, MD's NPI is 1114457769 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.