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Dr. Mark B. Ratcliffe , MD

Surgery β€’ San Francisco, CA

Active NPI 1306875778 Individual Practitioner Male Practitioner
Practice location in NPPES

505 Parnassus Ave
San Francisco, CA 941432204

Call 4154761606 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

505 Parnassus Ave

San Francisco, CA 941432204

Telephone 4154761606
Fax 4153531312
Organization at the Same NPPES Address or Phone
University Of California San Francisco Facility NPI 1265481089

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Industry payments (Open Payments)

No Open Payments records are listed for this clinician for 2019–2025.

Guide: How to read an Open Payments record

NPI first issued

2006

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Medicare assignment not listed

CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians, CMS release of October 2, 2026; Medicare.gov, β€œDoes your provider accept Medicare as full payment?”

Guide: What Medicare assignment means

No telehealth indicator

CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians, CMS release of October 2, 2026.

Guide: How Medicare covers telehealth

Compared with the same specialty in San Francisco and California

216 active clinicians are listed under Surgery with a practice address in San Francisco, CA (3,129 in California).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in San Francisco

20.4% of these 216 clinicians have the CMS telehealth indicator.

46.3% of these 216 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Doctors and Clinicians, CMS release of October 2, 2026, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo Β· Report an error.

Specialties & License Numbers Reported to NPPES

Surgery Primary Specialty

NUCC Taxonomy Code: 208600000X

License # reported to NPPES CA G77336

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

Thoracic Surgery (Cardiothoracic Vascular Surgery)

NUCC Taxonomy Code: 208G00000X

License # reported to NPPES CA G77336

A thoracic surgeon provides the operative, perioperative and critical care of patients with pathologic conditions within the chest. Included is the surgical care of coronary artery disease, cancers of the lung, esophagus and chest wall, abnormalities of the trachea, abnormalities of the great vessels and heart valves, congenital anomalies, tumors of the mediastinum and diseases of the diaphragm. The management of the airway and injuries of the chest is within the scope of the specialty.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Medical Board of California.
Look Up on State Board Site

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid ID
00G773360 (CA)

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

12 listed
Alvin Joseph Abad , FNP-C

Nurse Practitioner - Family

NPI 1154919306

Family Nurse Practitioner (Certified)

Dr. Marko Boskovski , MD

Thoracic Surgery (Cardiothoracic Vascular Surgery)

NPI 1194084863

Doctor of Medicine (M.D.)

Dr. Amy Fiedler , MD

Thoracic Surgery (Cardiothoracic Vascular Surgery)

NPI 1912134453

Doctor of Medicine (M.D.)

Stephanie Hwang , RN, BSN, MSN

Nurse Practitioner - Acute Care

NPI 1083012884

Registered Nurse, Bachelor of Science in Nursing, Master of Science in Nursing

Dr. Michael Mann , MD

Thoracic Surgery (Cardiothoracic Vascular Surgery)

NPI 1659337426

Doctor of Medicine (M.D.)

NPI 1952365900

Doctor of Medicine (M.D.)

Career & Practice History

NPI enumerated June 30, 2006.

No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to November 2026.

No reviews have been published yet. Leave a review.

NPI Administrative Meta

NPI Number: 1306875778
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: June 30, 2006
Last Update: July 23, 2008
Sole Proprietor: No

Other Surgery Specialists in San Francisco

All Surgery Specialists in San Francisco

Mailing Address

1635 Divisadero Street, Suite 625, Box 1821

San Francisco, CA 941430001

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.