MS. CLARISSA ANN RAMSTEAD ANP
NPI 1992836548
Nurse Practitioner - Adult Health in San Francisco, CA
NPI Status: Active since March 07, 2007
Contact Information
995 POTRERO AVE
BLDG 80, 6TH FLOOR
SAN FRANCISCO, CA
ZIP 94110
Phone: (415) 206-2449
Fax: (415) 502-9566
- Individual
- Female
- Nurse Practitioner
- Adult Health
- PECOS Enrolled
About CLARISSA RAMSTEAD
This page provides the complete NPI Profile along with additional information for Clarissa Ramstead, a provider established in San Francisco, California with a medical specialization in Nurse Practitioner, focusing in adult health . The healthcare provider is registered in the NPI registry with number 1992836548 assigned on March 2007. The practitioner's primary taxonomy code is 363LA2200X with license number 464445 (CA). The provider is registered as an individual and her NPI record was last updated 14 years ago.
- NPI
- 1992836548
- Provider Name
- MS. CLARISSA ANN RAMSTEAD ANP
- Other Name
- MS. CLARISSA ANN OSPINA NP
- Other Name Type
- Former Name (1)
- Gender
- Female
- Entity Type
- Individual
- Location Address
- 995 POTRERO AVE BLDG 80, 6TH FLOOR SAN FRANCISCO, CA 94110
- Location Phone
- (415) 206-2449
- Location Fax
- (415) 502-9566
- Mailing Address
- 995 POTRERO AVE BLDG 80, 6TH FLOOR SAN FRANCISCO, CA 94110
- Mailing Phone
- (415) 206-2449
- Mailing Fax
- (415) 502-9566
- Is Sole Proprietor?
- No
- Enumeration Date
- 03-07-2007
- Last Update Date
- 01-12-2012
- Code Navigator
A nurse practitioner (NP) like Clarissa Ramstead is an experienced registered nurse with a master’s or doctoral degree and advanced clinical training. Nurse practitioners can work in many different specialties including primary care, pediatrics, cardiology, emergency, women’s health, oncology or geriatrics. Nurse practitioners provide services like physical exams, order laboratory tests, manage diseases, write prescriptions, etc.
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
Nurse Practitioner Adult Health
- Taxonomy Code
- 363LA2200X
- Type
- Physician Assistants & Advanced Practice Nursing Providers
- License No.
- 464445
- License State
- CA
Medicare Participation & PECOS Enrollment Status
Clarissa Ramstead 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
Physician Visit Costs
The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.
For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.
The prices below reflect the costs for new and established patients in the 94110 ZIP code area.
New Patients Visit Costs *
The most utilized procedure code for new patients office visits is 99203
- Average New Patient Price $104.51
- Minimum New Patient Price $69
- Maximum New Patient Price $202.35
- Average New Patient Copayment $26.12
- Minimum New Patient Copayment $17.25
- Maximum New Patient Copayment $50.58
Established Patients Visit Costs *
The most utilized procedure code for established patients office visits is 99214
- Average Established Patient Price $119.48
- Minimum Established Patient Price $23.44
- Maximum Established Patient Price $166.46
- Average Established Patient Copayment $29.87
- Minimum Established Patient Copayment $5.86
- Maximum Established Patient Copayment $41.61
* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.
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NPI Validation Check Digit Calculation
The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.
| Start with the original NPI number, the last digit is the check digit and is not used in the calculation. | |||||||||
| 1 | 9 | 9 | 2 | 8 | 3 | 6 | 5 | 4 | 8 |
| Step 1: Double the value of the alternate digits, beginning with the rightmost digit. | |||||||||
| 2 | 9 | 18 | 2 | 16 | 3 | 12 | 5 | 8 | |
| Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24. | |||||||||
| 2 + 9 + 1 + 8 + 2 + 1 + 6 + 3 + 1 + 2 + 5 + 8 + 24 = 72 | |||||||||
| Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit. | |||||||||
| 80 - 72 = 8 | 8 | ||||||||
The NPI number 1992836548 is valid because the calculated check digit 8 using the Luhn validation algorithm matches the last digit of the original NPI number.
Other Providers at the Same Location
The following 20 providers are registered at the same or nearby location.
| NPI | Name / Type | Taxonomy | Address |
|---|---|---|---|
| 1902887847 | DR. KATERINA A CHRISTOPOULOS MD Individual | Internal Medicine | 995 POTRERO AVE WARD 84 SAN FRANCISCO, CA 94110 (415) 476-4082 |
| 1265475818 | DR. IAN MCNICHOLL PHARM.D., BCPS Individual | Pharmacist (Pharmacotherapy) | 995 POTRERO AVE UCSF POSITIVE HEALTH PRACTICE, BLDG 80, WARD 86 SAN FRANCISCO, CA 94110 (415) 206-2421 |
| 1235153123 | MS. JENNIFER REI KANENAGA RN, MSN, FNP Individual | Nurse Practitioner (Family) | 995 POTRERO AVE FAMILY HEALTH CENTER, WARD 83 SAN FRANCISCO, CA 94110 (415) 206-8610 |
| 1457362691 | DR. CHRISTINE ELIZABETH DEHLENDORF M.D. Individual | Family Medicine | 995 POTRERO AVE WARD 83 SAN FRANCISCO, CA 94110 (415) 206-6491 |
| 1386751170 | JAMES O KAHN MD Individual | Internal Medicine | 995 POTRERO AVE BLDG 80 WARD 84 SAN FRANCISCO, CA 94110 (415) 476-4082 |
| 1649387457 | GEORGE WILLIAM BEATTY MD Individual | Internal Medicine | 995 POTRERO AVE BLDG 80 WARD 84 SAN FRANCISCO, CA 94110 (415) 476-4082 |
| 1811004559 | PAULA JOY LUM M.D., M.P.H. Individual | Internal Medicine | 995 POTRERO AVE BUILDING 80, WARD 84 SAN FRANCISCO, CA 94110 (415) 206-2400 |
| 1114034873 | LAURENCE HUANG MD Individual | Internal Medicine | 995 POTRERO AVE BLDG 80 WARD 84 SAN FRANCISCO, CA 94110 (415) 476-4082 |
| 1114034915 | DIANE V HAVLIR MD Individual | Internal Medicine | 995 POTRERO AVE BLDG 80 WARD 84 SAN FRANCISCO, CA 94110 (415) 476-4082 |
| 1487761227 | JACQUELINE PETERSON TULSKY MD Individual | Internal Medicine | 995 POTRERO AVE BLDG 80 WARD 84 SAN FRANCISCO, CA 94110 (415) 476-4082 |
| 1730296484 | DR. PETER WILLIAM HUNT MD Individual | Internal Medicine | 995 POTRERO AVE SFGH BUILDING 80, WARD 84 SAN FRANCISCO, CA 94110 (415) 476-4082 |
| 1205930831 | LISSA WYNNE STURDEVANT NP Individual | Nurse Practitioner | 995 POTRERO AVE WARD 86 SAN FRANCISCO, CA 94110 (415) 476-4082 |
| 1386712412 | SUSAN HOUSER CPNP Individual | Nurse Practitioner (Pediatrics) | 995 POTRERO AVE BUILDING 80, RM 239 SAN FRANCISCO, CA 94110 (415) 206-8386 |
| 1851469852 | ANAND A DHRUVA MD Individual | Internal Medicine | 995 POTRERO AVE BLDG 80 WARD 84 SAN FRANCISCO, CA 94110 (415) 476-4082 |
| 1588719090 | JODY FRIEDMAN LCSW Individual | Social Worker (Clinical) | 995 POTRERO AVE SFGH/CASARC WARD 82 SAN FRANCISCO, CA 94110 (415) 206-6271 |
| 1346378940 | ANNE FREY LUETKEMEYER MD Individual | Internal Medicine (Infectious Disease) | 995 POTRERO AVE BOX 0874 SAN FRANCISCO, CA 94110 (415) 476-4082 |
| 1902029705 | CATHERINE ANNE LYONS RN, ANP Individual | Nurse Practitioner (Adult Health) | 995 POTRERO AVE SAN FRANCISCO GENERAL HOSPITAL BUILDING 80, WARD 86 SAN FRANCISCO, CA 94110 (415) 476-4082 |
| 1508089962 | ERICA TORRES PSYD Individual | Psychologist (Clinical) | 995 POTRERO AVE BLDG 80 WARD 82 RM 239 CASARC SAN FRANCISCO, CA 94110 (415) 206-8386 |
| 1225256092 | DR. JENNIE ORLAND M.D. Individual | Internal Medicine | 995 POTRERO AVE URGENT CARE CENTER - BUILDING 80, WARD 81 SAN FRANCISCO, CA 94110 (415) 206-5830 |
| 1902016363 | MR. PAUL M DERTIEN Individual | Counselor (Addiction (Substance Use Disorder)) | 995 POTRERO AVE WARD 93 SAN FRANCISCO, CA 94110 (415) 206-8412 |
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1992836548, enumerated in the NPI registry as an "individual" on March 07, 2007
The provider is located at 995 Potrero Ave Bldg 80, 6th Floor San Francisco, Ca 94110 and the phone number is (415) 206-2449
The provider's speciality is Nurse Practitioner with taxonomy code 363LA2200X with a focus in Adult Health
Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary 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.
Medicare beneficiaries should expect a typical cost of $104.51 with an average copayment of $26.12 for new patient appointments. Established patients should expect a typical charge of $119.48 and an average copayment of 29.87. Please review your insurance plan or contact the provider directly to determine your specific costs.
This NPI record was last updated on March 07, 2007. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
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