DR. GREGORY WILLIAM ALEXANDER FRASER MBBCHB
NPI 1891674941
Anesthesiology in San Francisco, CA
NPI Status: Active since September 01, 2025
Contact Information
521 PARNASSUS AVE
SAN FRANCISCO, CA
ZIP 94143
Phone: (415) 514-1043
- Individual
- Male
- Anesthesiology
- PECOS Enrolled
About GREGORY FRASER
This page provides the complete NPI Profile along with additional information for Gregory Fraser, an anesthesiologist established in San Francisco, California with a medical specialization in Anesthesiology. The healthcare provider is registered in the NPI registry with number 1891674941 assigned on September 2025. The practitioner's primary taxonomy code is 207L00000X with license number SPI904 (CA). The provider is registered as an individual and his NPI record was last updated one year ago.
- NPI
- 1891674941
- Provider Name
- DR. GREGORY WILLIAM ALEXANDER FRASER MBBCHB
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 521 PARNASSUS AVE SAN FRANCISCO, CA 94143
- Location Phone
- (415) 514-1043
- Mailing Address
- 1460 5TH AVE SAN FRANCISCO, CA 94122
- Mailing Phone
- (415) 793-4526
- Is Sole Proprietor?
- Yes
- Enumeration Date
- 09-01-2025
- Last Update Date
- 09-01-2025
- Code Navigator
An anesthesiologist like Gregory Fraser manages the care of surgical patients and pain relief through drug administration that reduces or eliminates pain during an operation, medical procedure or during labor and delivery of babies. During surgical procedures anesthesiologists are responsible for adjusting the amount of anesthetic, monitoring the patient's heart rate, body temperature, blood pressure and breathing.
Location Map
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Anesthesiology
- Taxonomy Code
- 207L00000X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- SPI904
- License State
- CA
- Taxonomy Description
- 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.
Medicare Participation & PECOS Enrollment Status
Gregory Fraser is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.
What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.
Is the provider registered in PECOS? Yes
Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes
Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes
Eligible to Order or Refer a Home Health Agency (HHA): Yes
Eligible to Order or Refer Power Mobility Devices: Yes
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NPI NPI Number Validation
How NPI Validation Works
The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.
To verify the NPI 1891674941, we treat the final digit (1) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 79. The final step is to find the difference between that total and the next multiple of ten (80 - 79 = 1).
Digit-by-digit view
Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.
Step 1: Double every other digit from the right
Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 79 is 80. The difference is the calculated check digit.
Other Providers at the Same Location
The following 20 providers are registered at the same or a nearby location.
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1891674941, enumerated as an "individual" on September 01, 2025.
The provider is located at 521 PARNASSUS AVE SAN FRANCISCO, CA 94143 and the phone number is (415) 514-1043.
Anesthesiology with taxonomy code 207L00000X.
