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DR. CRYSTAL NNENNE AZU MD
NPI 1114457769
Internal Medicine - Cardiovascular Disease in Saint Louis, MO

Active since June 15, 2017PECOS EnrolledAccepts Medicare Assignment
4921 PARKVIEW PL, DIV IM CARDIOLOGY, STE 8B, SAINT LOUIS, MO 63110(314) 362-1291(314) 362-4278 Get Directions Write a Review

NPPES record last updated: April 15, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Nov 19, 2024, Sep 3, 2024, May 29, 2020 and 2 more (5 updates tracked since 2017).

About Dr. Crystal Nnenne Azu Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. CRYSTAL NNENNE AZU MD (NPI 1114457769) is an individual cardiovascular disease provider in Saint Louis, Missouri, licensed in Missouri (2024030894) and active in the NPI registry since June 2017. She is enrolled in Medicare PECOS, is affiliated with Alton Memorial Hospital, and is a graduate of University Of Chicago, Pritzker School Of Medicine (2017).

NPPES Registry Identity

NPI1114457769
Entity TypeIndividualFemale
Primary Taxonomy207RC0000X
Provider Legal NameDR. CRYSTAL NNENNE AZUCredential: MD
Location Address4921 PARKVIEW PL, DIV IM CARDIOLOGY, STE 8BSaint Louis, MO 63110-1032
Mailing AddressPo Box 7412011Chicago, IL 60674-2011 · (314) 362-1291 · Fax (314) 362-4278
Phone(314) 362-1291
Fax(314) 362-4278
Sole ProprietorNo
Medical School CMSUniversity Of Chicago, Pritzker School Of MedicineGraduated 2017
Enumeration DateJune 15, 2017
Last NPPES UpdateApril 15, 20255 updates tracked since enumeration
NPPES CertifiedMay 29, 2020
✔ NPI 1114457769 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License✔ Licensed in MO · 2024030894
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
Also ListedInternal MedicineTaxonomy 207R00000X · License 2024030894 (MO)
Also ListedRadiology · Diagnostic RadiologyTaxonomy 2085R0202X · License 2024030894 (MO)
4921 PARKVIEW PL, Saint Louis, MO 63110
Open in Google Maps ↗

Other Identifiers 1

Medicaid200146372MO

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Cox HealthPlans.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Crystal Nnenne Azu Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3476822321
PECOS Enrollment IDI20240917004643
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306
This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.
37 services37 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000
An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.
24 services23 patients
Heart muscle strain imaging 93356
Heart muscle strain imaging is a non-invasive test that uses sound waves to create pictures of your heart. It helps doctors evaluate how well your heart muscle is working and detect any damage or disease. This can aid in diagnosing heart conditions and guiding treatment plans.
23 services23 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
17 services17 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
14 services14 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Alton Memorial Hospital

Acute Care Hospitals · Alton, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140002
LocationOne Memorial DriveAlton, IL 62002 · Madison County
Emergency services Birthing friendly

Memorial Hospital

Acute Care Hospitals · Belleville, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140185
Location4500 Memorial DriveBelleville, IL 62226 · St. Clair County
Emergency services Birthing friendly

Barnes Jewish Hospital

Acute Care Hospitals · Saint Louis, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number260032
LocationOne Barnes-Jewish Hospital PlazaSaint Louis, MO 63110 · St. Louis City County
Emergency services Birthing friendly

Missouri Baptist Medical Center

Acute Care Hospitals · Town And Country, MO
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260108
Location3015 N Ballas RdTown And Country, MO 63131 · St. Louis County
Emergency services Birthing friendly

Barnes-Jewish West County Hospital

Acute Care Hospitals · Creve Coeur, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260162
Location12634 Olive BoulevardCreve Coeur, MO 63141 · St. Louis County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63110 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$128.28 typical visit price
range $55.65 – $169.38
Typical copayment $32.07 (range $13.91 – $42.34)
Most-billed visit code 99204
Established Patient
$69.50 typical visit price
range $17.76 – $137.92
Typical copayment $17.37 (range $4.44 – $34.48)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MS. CHERYL ANNE WOOLSEY PA
Physician Assistant
4921 PARKVIEW PL, DIV SURG HPB, STE 12B
SAINT LOUIS, MO 63110
St. Louis City (314) 747-0410
DR. CHARLES PHILLIPS JONES MD
Urology
4921 PARKVIEW PL, DIV SURG UROLOGY, STE 11C
SAINT LOUIS, MO 63110
St. Louis City (314) 362-8200
DR. PRABHA RANGANATHAN MD
Internal Medicine (Rheumatology)
4921 PARKVIEW PL, DIV IM RHEUMATOLOGY, STE 5C
SAINT LOUIS, MO 63110
St. Louis City (314) 286-2635
DR. RALPH GERARD DACEY JR. MD
Neurological Surgery
4921 PARKVIEW PL, DEPT NEUROLOGICAL SURGERY, STE 6B/6C
SAINT LOUIS, MO 63110
St. Louis City (314) 362-3577
DR. KRASIMIRA MIKHAILOVA MIKHOVA MD
Internal Medicine (Clinical Cardiac Electrophysiology)
4921 PARKVIEW PL, DIV IM CARDIOLOGY, STE 8B
SAINT LOUIS, MO 63110
St. Louis City (314) 362-1291
DR. JEE YOUNG HAN MD
Psychiatry & Neurology (Neurology)
4921 PARKVIEW PL, DIV NEUROLOGY AGING AND DEMENTIA, STE 6C
SAINT LOUIS, MO 63110
St. Louis City (314) 362-1408
MS. MAREN JORGENSEN OT
Occupational Therapist
4921 PARKVIEW PL, DEPT OCCUPATIONAL THERAPY, STE 6F
SAINT LOUIS, MO 63110
St. Louis City (314) 286-1669
DR. ADRIAN SHIFREN MD
Internal Medicine (Pulmonary Disease)
4921 PARKVIEW PL, DIV IM PULMONARY AND CCM, 8TH FL
SAINT LOUIS, MO 63110
St. Louis City (314) 454-8917

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Crystal Azu's NPI number?

The NPI number for Crystal Azu is 1114457769. It was assigned to this individual provider in the NPPES registry on June 15, 2017.

Where is Crystal Azu located?

Crystal Azu practices at 4921 Parkview Pl Div Im Cardiology, Ste 8B, Saint Louis, MO 63110. The listed phone number is (314) 362-1291.

What is Crystal Azu's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Crystal Azu enrolled in Medicare?

Yes. Crystal Azu is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Crystal Azu accept?

Health plans from Cox HealthPlans list Crystal Azu as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Crystal Azu affiliated with any hospitals?

According to CMS data, Crystal Azu is affiliated with Alton Memorial Hospital, Memorial Hospital, Barnes Jewish Hospital, Missouri Baptist Medical Center and Barnes-Jewish West County Hospital.

When was this NPI record last updated?

The NPPES record for Crystal Azu was last updated on April 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.