Kelsey Haruko Natsuhara, MD in San Francisco, CA

Kelsey Haruko Natsuhara, MD is a medicare enrolled "Internal Medicine - Medical Oncology" physician in San Francisco, California. Her current practice location is 1825 4th St Fl 3, San Francisco, California. You can reach out to her office (for appointments etc.) via phone at (415) 353-7070.

Kelsey Haruko Natsuhara is licensed to practice in California (license number A165347) and she also participates in the medicare program. She does not accept medicare assignments directly but she may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. Her NPI Number is 1265936413.

Contact Information

	Kelsey Haruko Natsuhara, MD
	1825 4th St Fl 3, San Francisco, CA 94143-2350
	(415) 353-7070
	Not Available

Map and Direction

Physician's Profile

Full Name	Kelsey Haruko Natsuhara
Gender	Female
Speciality	Internal Medicine - Medical Oncology
Location	1825 4th St Fl 3, San Francisco, California
Accepts Medicare Assignments	Medicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.

NPI Data:

NPI Number: 1265936413
Provider Enumeration Date: 03/22/2018
Last Update Date: 11/13/2025

Medicare PECOS Information:

PECOS PAC ID: 0244632529
Enrollment ID: I20210708002604

Medical Identifiers

Medical identifiers for Kelsey Haruko Natsuhara such as npi, medicare ID, medicare PIN, medicaid, etc.

Identifier	Type	State	Issuer
1265936413	NPI	-	NPPES

Medical Taxonomies and Licenses

Taxonomy	Type	License (State)	Status
207RX0202X	Internal Medicine - Medical Oncology	A165347 (California)	Primary

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Kelsey Haruko Natsuhara allows following entities to bill medicare on her behalf.

Entity Name	Regents Of The University Of California
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1760552343 PECOS PAC ID: 4284547274 Enrollment ID: O20031106000389

Entity Name	University Of California San Francisco
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1861578973 PECOS PAC ID: 4486567229 Enrollment ID: O20031212000897

Entity Name	Ucsf Medical Group Business Services
Entity Type	Part B Supplier - Clinic/group Practice
Entity Identifiers	NPI Number: 1477624104 PECOS PAC ID: 3779497870 Enrollment ID: O20040622001513

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Kelsey Haruko Natsuhara is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing Address	Practice Location Address
Kelsey Haruko Natsuhara, MD 1825 4th St Fl 3, San Francisco, CA 94143-2350 Ph: (415) 353-7070	Kelsey Haruko Natsuhara, MD 1825 4th St Fl 3, San Francisco, CA 94143-2350 Ph: (415) 353-7070

Reviews and Comments

Internal Medicine Doctors in San Francisco, CA

Joseph Li-han Yang, M.D. Internal Medicine Medicare: Accepting Medicare Assignments Practice Location: 505 Parnassus Ave, San Francisco, CA 94143 Phone: 415-476-1000
Dr. Pratyusha Kishore Narra, MBBS Internal Medicine Medicare: Accepting Medicare Assignments Practice Location: 3490 California St, San Francisco, CA 94118 Phone: 415-514-6200 Fax: 415-514-6410
Dr. Chelsea Joy Thomsen, M.D., M.S.P.H Internal Medicine Medicare: Accepting Medicare Assignments Practice Location: 2 W Portal Ave, San Francisco, CA 94127 Phone: 415-291-0480 Fax: 415-252-7176
Christine Soran, Internal Medicine Medicare: Medicare Enrolled Practice Location: 1001 Potrero Ave, Bldg 10, 3rd Floor, Ward 13, Ucsf Division Of General Internal Medicine Sfgh, San Francisco, CA 94110 Phone: 415-206-5164 Fax: 415-206-5586
Stephen Norris Cohen, MD Internal Medicine Medicare: Not Enrolled in Medicare Practice Location: 40 Ventura Ave, San Francisco, CA 94116 Phone: 415-681-2171 Fax: 415-681-2171
Dr. Claudio Andres Bravo Carrillo, M.D. Internal Medicine Medicare: Accepting Medicare Assignments Practice Location: 505 Parnassus Ave, San Francisco, CA 94143 Phone: 415-502-4243 Fax: 415-502-0243
Mauricio Jalife Bucay, M.D Internal Medicine Medicare: Accepting Medicare Assignments Practice Location: 505 Parnassus Ave, San Francisco, CA 94143 Phone: 415-750-4994 Fax: 415-750-8156

Kelsey Haruko Natsuhara, MD - Medicare Internal Medicine in San Francisco, CA