DR. ALEXANDER DAVID BOROWSKY M.D.
NPI 1891777512
Pathology - Anatomic Pathology & Clinical Pathology in San Francisco, CA

NPI Status: Active since November 17, 2005

Contact Information

1825 4TH ST
SAN FRANCISCO, CA
ZIP 94143
Phone: (415) 353-1613

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  • Individual
  • Male
  • Years of Experience 32
  • Pathology
  • Anatomic Pathology & Clinical Pathology
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About ALEXANDER BOROWSKY

This page provides the complete NPI Profile along with additional information for Alexander Borowsky, a provider established in San Francisco, California with a medical specialization in Pathology, focusing in anatomic pathology & clinical pathology and more than 32 years of experience. He graduated from Vanderbilt University School Of Medicine in 1994. The healthcare provider is registered in the NPI registry with number 1891777512 assigned on November 2005. The practitioner's primary taxonomy code is 207ZP0102X with license number A77194 (CA). The provider is registered as an individual and his NPI record was last updated one year ago.

NPI
1891777512
Provider Name
DR. ALEXANDER DAVID BOROWSKY M.D.
Gender
Male
Entity Type
Individual
Location Address
1825 4TH ST SAN FRANCISCO, CA 94143
Location Phone
(415) 353-1613
Mailing Address
1825 4TH ST SAN FRANCISCO, CA 94143
Medical School Name
VANDERBILT UNIVERSITY SCHOOL OF MEDICINE
Graduation Year
1994
Is Sole Proprietor?
No
Enumeration Date
11-17-2005
Last Update Date
08-25-2025
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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

Pathology Anatomic Pathology & Clinical Pathology

Taxonomy Code
207ZP0102X
Type
Allopathic & Osteopathic Physicians
License No.
A77194
License State
CA
Taxonomy Description
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1174400000XOther Service Providers

Specialist

A77194 (CA)

Medicare Participation & PECOS Enrollment Status

Alexander Borowsky is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Alexander Borowsky 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

  • PECOS PAC ID: 3678758430

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20110421000457

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • 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

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Microscopic genetic analysis of tissue, manual, each additional multiplex stain procedure

Microscopic genetic analysis of tissue is a detailed lab process that examines your cells' genetic material. If more than one stain procedure is needed, it's termed an 'additional multiplex stain procedure'. This helps to highlight different components within your cells, aiding in accurate diagnosis and treatment planning.

This service was performed 37 times for 36 patients

Microscopic genetic analysis of tumor, manual

Microscopic genetic analysis of a tumor involves examining your tumor's genes under a microscope. This helps identify specific genetic changes in the tumor cells. This information can aid in diagnosing, predicting disease progression, and determining the most effective treatment options.

This service was performed 152 times for 50 patients

Molecular pathology procedure; physician interpretation and report

A molecular pathology procedure involves analyzing your body's cells at a molecular level to identify any abnormalities. This can help detect diseases early. A physician will interpret the results and provide a detailed report, explaining the findings clearly.

This service was performed 48 times for 48 patients

Pathology examination of specimen during surgery, first tissue block

A pathology examination during surgery involves the immediate analysis of a removed tissue sample. This helps the surgeon make decisions during your operation. The "first tissue block" refers to the initial sample examined. It's a vital step to ensure your health.

This service was performed 74 times for 24 patients

Pathology examination of tissue using a microscope, high complexity

A high complexity pathology examination involves studying body tissue under a microscope to identify any abnormalities. This intricate process helps in diagnosing various conditions and deciding on the best treatment plan.

This service was performed 17 times for 16 patients

Pathology examination of tissue using a microscope, intermediate complexity

A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.

This service was performed 425 times for 228 patients

Pathology examination of tissue using a microscope, limited examination

A pathology examination of tissue using a microscope is a procedure where a small sample of your tissue is observed under a microscope. This limited examination helps identify any abnormal cells or signs of disease, aiding in accurate diagnosis and treatment planning.

This service was performed 12 times for 11 patients

Pathology examination of tissue using a microscope, moderately high complexity

A pathology examination of tissue with moderate complexity involves a detailed study of a small tissue sample from your body. Using a microscope, experts analyze the tissue's structure and cells to identify any abnormalities. This helps in diagnosing various health conditions accurately.

This service was performed 190 times for 70 patients

Pathology examination of tissue using a microscope, moderately low complexity

A pathology examination of tissue, moderately low complexity, involves studying a small sample of your body tissue under a microscope. It helps to identify any abnormal cells or diseases. It's a routine procedure, not complex, and provides crucial insights for your diagnosis.

This service was performed 16 times for 14 patients

Special stained specimen slides to examine tissue, each additional procedure

Special stained specimen slides are used to analyze tissue in detail. In this process, extra procedures may be needed for a more thorough examination. These involve applying special stains to the tissue on slides, enhancing specific elements for closer study.

This service was performed 194 times for 57 patients

Special stained specimen slides to examine tissue, each multiplex procedure

Special stained specimen slides are used to study tissue in detail. This multiplex procedure involves applying different dyes to the tissue sample on a slide to highlight specific elements. These colors help identify any abnormalities in the tissue, aiding in accurate diagnosis and treatment planning.

This service was performed 15 times for 13 patients

Special stained specimen slides to examine tissue, initial procedure

This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.

This service was performed 103 times for 86 patients

Surgical pathology consultation and report on referred slides prepared elsewhere

A surgical pathology consultation involves reviewing slides prepared at a different lab to confirm or clarify a diagnosis. It's a second opinion to ensure accuracy. A report with findings and interpretations is then provided for your doctor's reference.

This service was performed 26 times for 26 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $38.45 for a new patient copayment and $29.87 for an established patient copayment.

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 94143 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99204

  • Average New Patient Price $153.83
  • Minimum New Patient Price $69
  • Maximum New Patient Price $202.35
  • Average New Patient Copayment $38.45
  • 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 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 1891777512, we treat the final digit (2) 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 68. The final step is to find the difference between that total and the next multiple of ten (70 - 68 = 2).

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.

Pos 1
1
Doubled → 2
Pos 2
8
Unchanged
Pos 3
9
Doubled → 18 → 1 + 8
Pos 4
1
Unchanged
Pos 5
7
Doubled → 14 → 1 + 4
Pos 6
7
Unchanged
Pos 7
7
Doubled → 14 → 1 + 4
Pos 8
5
Unchanged
Pos 9
1
Doubled → 2
Check
2
Target digit
Regular digit Doubled digit Check digit

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.

1 → 2 9 → 18 → 9 7 → 14 → 5 7 → 14 → 5 1 → 2

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 8 + 1 + 8 + 1 + 1 + 4 + 7 + 1 + 4 + 5 + 2 + 24 = 68

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 68 is 70. The difference is the calculated check digit.

70 - 68 = 2
This NPI is valid
The calculated check digit is 2, which matches the last digit of 1891777512.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Nurse Practitioner
1825 4TH ST
SAN FRANCISCO, CA 94143
Dietitian, Registered (Nutrition, Renal)
1825 4TH ST, M5209
SAN FRANCISCO, CA 94143
Speech-Language Pathologist
1825 4TH ST, 5TH FLOOR
SAN FRANCISCO, CA 94143
Nurse Practitioner (Family)
1825 4TH ST, 4TH FLOOR, BOX 4065
SAN FRANCISCO, CA 94143
Nurse Practitioner
1825 4TH ST
SAN FRANCISCO, CA 94143
Student in an Organized Health Care Education/Training Program
1825 4TH ST
SAN FRANCISCO, CA 94143
Nurse Practitioner
1825 4TH ST
SAN FRANCISCO, CA 94143
Pediatrics (Pediatric Allergy/Immunology)
1825 4TH ST
SAN FRANCISCO, CA 94143
Obstetrics & Gynecology
1825 4TH ST
SAN FRANCISCO, CA 94143
Internal Medicine (Hematology & Oncology)
1825 4TH ST
SAN FRANCISCO, CA 94143
Thoracic Surgery (Cardiothoracic Vascular Surgery)
1825 4TH ST
SAN FRANCISCO, CA 94143
Genetic Counselor, MS
1825 4TH ST
SAN FRANCISCO, CA 94143
Nurse Practitioner
1825 4TH ST
SAN FRANCISCO, CA 94143
Nurse Practitioner (Pediatrics)
1825 4TH ST
SAN FRANCISCO, CA 94143
Nurse Practitioner (Adult Health)
1825 4TH ST
SAN FRANCISCO, CA 94143
Nurse Practitioner (Adult Health)
1825 4TH ST
SAN FRANCISCO, CA 94143
Internal Medicine (Medical Oncology)
1825 4TH ST
SAN FRANCISCO, CA 94143
Pharmacist (Oncology)
1825 4TH ST
SAN FRANCISCO, CA 94143
Pharmacist (Oncology)
1825 4TH ST
SAN FRANCISCO, CA 94143
Pharmacist
1825 4TH ST
SAN FRANCISCO, CA 94143

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1891777512, enumerated as an "individual" on November 17, 2005.

The provider is located at 1825 4TH ST SAN FRANCISCO, CA 94143 and the phone number is (415) 353-1613.

Pathology with taxonomy code 207ZP0102X and a focus in Anatomic Pathology & Clinical Pathology.