1. Home
  2. Directory
  3. California
  4. San Francisco
  5. Pediatrics
  6. NPI Profile
Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. DENNIS W NIELSON MD
NPI 1801850706
Pediatrics - Pediatric Pulmonology in San Francisco, CA

Active since April 17, 2006
400 PARNASSUS AVE, 2ND FLOOR, SAN FRANCISCO, CA 94143(415) 353-2113(415) 476-9278 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 13, 2026, Sep 11, 2025 (2 updates tracked since 2025).

About Dr. Dennis W Nielson Md NPPES

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

DR. DENNIS W NIELSON MD (NPI 1801850706) is an individual pediatric pulmonology provider in San Francisco, California, licensed in California (G35081) and active in the NPI registry since April 2006.

NPPES Registry Identity

NPI1801850706
Entity TypeIndividualMale
Primary Taxonomy2080P0214X
Provider Legal NameDR. DENNIS W NIELSONCredential: MD
Location Address400 PARNASSUS AVE, 2ND FLOORSan Francisco, CA 94143-2202
Mailing Address1635 Divisadero St., Ste. 625, Box 1821San Francisco, CA 94143-0001 · (415) 476-4029 · Fax (415) 476-4150
Phone(415) 353-2113
Fax(415) 476-9278
Sole ProprietorNo
Enumeration DateApril 17, 2006
Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration
✔ NPI 1801850706 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Pediatric PulmonologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0214X
License✔ Licensed in CA · G35081
Definition
A pediatrician dedicated to the prevention and treatment of all respiratory diseases affecting infants, children and young adults. This specialist is knowledgeable about the growth and development of the lung, assessment of respiratory function in infants and children, and experienced in a variety of invasive and noninvasive diagnostic techniques.
Also ListedPediatricsTaxonomy 208000000X · License G35081 (CA)
400 PARNASSUS AVE, San Francisco, CA 94143
Open in Google Maps ↗

Other Identifiers 1

Medicaid00G350810CA

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. ALEJANDRA GABRIELA DE ALBA CAMPOMANES MD, MPH
Ophthalmology
400 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 353-2560
DR. MARISSA A BOECK M.D.
Surgery (Surgical Critical Care)
400 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 353-2161
DR. JACQUELINE EVA WEINSTEIN M.D.
Otolaryngology (Pediatric Otolaryngology)
400 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-1000
TIFFANY PONG ROSS PA-C
Physician Assistant
400 PARNASSUS AVE, 3RD FLOOR, SUITE 311
SAN FRANCISCO, CA 94143
San Francisco County (415) 353-2739
SHINTARO TATEBE MSPT
Physical Therapist
400 PARNASSUS AVE, A-68
SAN FRANCISCO, CA 94143
San Francisco County (415) 353-8574
DR. YVONNE W WU MD
Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)
400 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 353-2813
DR. DAVID S. BRADFORD MD
Orthopaedic Surgery
400 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 353-2739
DR. SANG-MO KANG MD
Surgery
400 PARNASSUS AVE
SAN FRANCISCO, CA 94143
San Francisco County (415) 476-1551

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 Dennis Nielson's NPI number?

The NPI number for Dennis Nielson is 1801850706. It was assigned to this individual provider in the NPPES registry on April 17, 2006.

Where is Dennis Nielson located?

Dennis Nielson practices at 400 Parnassus Ave 2nd Floor, San Francisco, CA 94143. The listed phone number is (415) 353-2113.

What is Dennis Nielson's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Pulmonology, with taxonomy code 2080P0214X.

When was this NPI record last updated?

The NPPES record for Dennis Nielson was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 34 days 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.