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DIANA T PHAN M.D.
NPI 1972869311
Anesthesiology in Chicago, IL

Active since April 10, 2012PECOS Enrolled
1740 W TAYLOR ST, 3200W UIH M/C515, CHICAGO, IL 60612(312) 996-4021(312) 996-4019 Get Directions Write a Review

NPPES record last updated: August 8, 2016. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Aug 8, 2016, Jun 20, 2016 (2 updates tracked since 2016).

About Diana T Phan M.d. NPPES

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

DIANA T PHAN M.D. (NPI 1972869311) is an individual anesthesiology provider in Chicago, Illinois, licensed in California (129197) and active in the NPI registry since April 2012. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1972869311
Entity TypeIndividualFemale
Primary Taxonomy207L00000X
Provider Legal NameDIANA T PHANCredential: M.D.
Location Address1740 W TAYLOR ST, 3200W UIH M/C515Chicago, IL 60612-7232
Mailing Address21 LeeIrvine, CA 92620-6202 · (312) 515-8056
Phone(312) 996-4021
Fax(312) 996-4019
Sole ProprietorNo
Enumeration DateApril 10, 2012
Last NPPES UpdateAugust 8, 20162 updates tracked since enumeration
✔ NPI 1972869311 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
Licenses✔ Licensed in CA · 129197✔ Licensed in IL · 036140455
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
1740 W TAYLOR ST, Chicago, IL 60612
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Diana T Phan M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Medicare Billing Reassignment

Medicare enrollment records show Diana Phan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

County Of Los Angeles
1,704 mi
Clinic/Center
335 E AVENUE I
Lancaster, CA 93535
  • Reassigned Medicare billing, California enrollment
  • 1,939 clinicians in this Medicare group
NPI 1205354370 (661) 471-4232

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

MRS. CATHLEEN CONWAY JENSEN OTR/L
Occupational Therapist
1740 W TAYLOR ST, C100
CHICAGO, IL 60612
Cook County (312) 996-3700
KELLY M HOYERT PA-C
Physician Assistant (Surgical)
1740 W TAYLOR ST, 3F OCC
CHICAGO, IL 60612
Cook County (312) 355-4300
DR. YI-LOONG COLIN WOON M.D.
Orthopaedic Surgery (Adult Reconstructive Orthopaedic Surgery)
1740 W TAYLOR ST
CHICAGO, IL 60612
Cook County (866) 600-2273
VIDHI SRIVASTAVA MD
Anesthesiology
1740 W TAYLOR ST
CHICAGO, IL 60612
Cook County (866) 600-2273
AMY PHAM D.O.
Pediatrics (Neonatal-Perinatal Medicine)
1740 W TAYLOR ST
CHICAGO, IL 60612
Cook County (866) 600-2273
WILSON CHING M.D.
Family Medicine
1740 W TAYLOR ST
CHICAGO, IL 60612
Cook County (866) 600-2273
ADRIENNE BERMAN MD
Ophthalmology
1740 W TAYLOR ST
CHICAGO, IL 60612
Cook County (866) 600-2273
JOSEPH S COLLA M.D.
Emergency Medicine
1740 W TAYLOR ST
CHICAGO, IL 60612
Cook County (312) 996-8177

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 Diana Phan's NPI number?

The NPI number for Diana Phan is 1972869311. It was assigned to this individual provider in the NPPES registry on April 10, 2012.

Where is Diana Phan located?

Diana Phan practices at 1740 W Taylor St 3200W Uih M/C515, Chicago, IL 60612. The listed phone number is (312) 996-4021.

What is Diana Phan's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Diana Phan enrolled in Medicare?

Yes. Diana Phan is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Diana Phan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Diana Phan reassigns Medicare benefits to County Of Los Angeles (Lancaster, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Diana Phan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Diana Phan was last updated on August 8, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years 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.