Crystal Azu, MD
NPI 1114457769 · Cardiovascular Disease Physician · Saint Louis, MO
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Crystal Azu, MD is a Cardiovascular Disease Physician provider in Saint Louis, MO (NPI 1114457769).
Provider details
- NPI number
- 1114457769
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 2024030894 (MO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
9 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
115 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 37 | $65 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 24 | $13 |
| Heart Muscle Strain Imaging93356 | 23 | $11 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 17 | $154 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 14 | $117 |
Typical Medicare-allowed amounts for these services range $11–$154 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Metoprolol Succinate | 63 | 22 |
| Atorvastatin Calcium | 46 | 25 |
| Furosemide | 29 | 13 |
| Spironolactone | 26 | 12 |
| Ezetimibe | 23 | — |
| Sacubitril/Valsartanbrand: Entresto | 21 | — |
| Olmesartan Medoxomil | 19 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$291 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-06-15
- Last updated
- 2025-04-15
- Certified
- 2020-05-29
Frequently asked questions
- What is Crystal Azu's NPI number?
- Crystal Azu's National Provider Identifier (NPI) is 1114457769, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Crystal Azu's specialty?
- Crystal Azu is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Crystal Azu located?
- Crystal Azu's practice location on file with NPPES is 4921 Parkview Pl, Saint Louis, MO 63110-1032.
- What is Crystal Azu's phone number?
- The practice phone number listed in the NPPES registry for Crystal Azu is (314) 362-1291.
- Does Crystal Azu accept Medicare?
- Crystal Azu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Crystal Azu's NPI active?
- Yes — Crystal Azu's NPI (1114457769) is active in the NPPES registry as of the last update on 2025-04-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.