1. Home
  2. Directory
  3. Connecticut
  4. Danbury
  5. Internal Medicine
  6. NPI Profile

DR. ANNABELLE YANWEN GUO MD, PHD
NPI 1316523095
Internal Medicine - Rheumatology in Danbury, CT

Active since March 22, 2021PECOS Enrolled
24 HOSPITAL AVE, DANBURY, CT 06810(203) 739-7900 Get Directions Write a Review

NPPES record last updated: April 3, 2026. Verified against the NPPES registry weekly; last sync: September 06, 2026.

Record update history: Apr 3, 2026, Jun 5, 2024, Mar 22, 2021 (3 updates tracked since 2021).

About Dr. Annabelle Yanwen Guo Md, Phd NPPES

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

DR. ANNABELLE YANWEN GUO MD, PHD (NPI 1316523095) is an individual rheumatology provider in Danbury, Connecticut, licensed in Connecticut (81681) and active in the NPI registry since March 2021. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1316523095
Entity TypeIndividualFemale
Primary Taxonomy207RR0500X
Provider Legal NameDR. ANNABELLE YANWEN GUOCredential: MD, PHD
Location Address24 HOSPITAL AVEDanbury, CT 06810-6077
Mailing Address24 Hospital AveDanbury, CT 06810-6077 · (203) 739-7900
Phone(203) 739-7900
Sole ProprietorNo
Enumeration DateMarch 22, 2021
Last NPPES UpdateApril 3, 20263 updates tracked since enumeration
NPPES CertifiedApril 3, 2026
✔ NPI 1316523095 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians
Taxonomy Code207RR0500X
License✔ Licensed in CT · 81681
Definition
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
24 HOSPITAL AVE, Danbury, CT 06810
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Annabelle Yanwen Guo Md, Phd 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06810 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
$138.84 typical visit price
range $60.82 – $183.10
Typical copayment $34.71 (range $15.20 – $45.77)
Most-billed visit code 99204
Established Patient
$106.68 typical visit price
range $19.76 – $149.26
Typical copayment $26.67 (range $4.94 – $37.31)
Most-billed visit code 99214
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.

DR. ANDREW CALIGIURI D.O.
Emergency Medicine
24 HOSPITAL AVE
DANBURY, CT 06810
Western Connecticut Planning Region (203) 739-7000
GARRETT JAFFE
Nurse Anesthetist, Certified Registered
24 HOSPITAL AVE
DANBURY, CT 06810
Western Connecticut Planning Region (203) 739-7118
DR. SUHANKI RAJAPAKSA M.D
Student in an Organized Health Care Education/Training Program
24 HOSPITAL AVE
DANBURY, CT 06810
Western Connecticut Planning Region (203) 739-4973
MR. PETER X ZHANG PA-C
Physician Assistant (Surgical)
24 HOSPITAL AVE
DANBURY, CT 06810
Western Connecticut Planning Region (203) 739-7000
CHRISTIE ALLEN
Nurse Practitioner (Acute Care)
24 HOSPITAL AVE
DANBURY, CT 06810
Western Connecticut Planning Region (203) 739-7000
DANBURY OFFICE OF PHYSICIAN SERVICES, P.C.
Anesthesiology
24 HOSPITAL AVE
DANBURY, CT 06810
Western Connecticut Planning Region (203) 797-7442
REBECCA E. PIKE M.D.
Internal Medicine
24 HOSPITAL AVE
DANBURY, CT 06810
Western Connecticut Planning Region (203) 739-7000
JACOB BARTEL LOTSTEIN M.D.
Emergency Medicine
24 HOSPITAL AVE
DANBURY, CT 06810
Western Connecticut Planning Region (203) 739-7100

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 Annabelle Guo's NPI number?

The NPI number for Annabelle Guo is 1316523095. It was assigned to this individual provider in the NPPES registry on March 22, 2021.

Where is Annabelle Guo located?

Annabelle Guo practices at 24 Hospital Ave, Danbury, CT 06810. The listed phone number is (203) 739-7900.

What is Annabelle Guo's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Is Annabelle Guo enrolled in Medicare?

Yes. Annabelle Guo is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Annabelle Guo was last updated on April 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.