NPPES file of Aug 9, 2026

Mary Rebecca Janowitz, R.N., IBCLC

Lactation Consultant (Registered Nurse) · San Francisco, CA

Mary Rebecca Janowitz, R.N., IBCLC is a lactation consultant (registered nurse) with a practice address in San Francisco, California, and NPI 1386850147, issued on May 15, 2007. Check the license (California 10016523, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1386850147
Name
Mary Rebecca Janowitz
Credential
R.N., IBCLC
Primary taxonomy
Lactation Consultant (Registered Nurse) 163WL0100X
License number
10016523 CA
Self-reported in NPPES; status is on the state search
Practice location
3555 Cesar Chavez, San Francisco, CA 94110
Phone
(415) 641-6869
Enumerated
May 15, 2007
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest lactation consultant (registered nurse) records → All 443 in California → Look up another NPI →

Also registered at 3555 Cesar Chavez

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Jacob Aaron, MDInternal Medicine Physician1407202518
  2. Connie Amorde, P.A.-CPhysician Assistant1306884846
  3. Kamran AtabaiInternal Medicine Physician1992816680
  4. Enrique AyaldeCritical Care Medicine Nurse Practitioner1235696584
  5. Nader Banki, MDInternal Medicine Physician1518029792
  6. Efren Baria, DOPain Medicine (Anesthesiology) Physician1609982115

Verify Mary Rebecca Janowitz in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license 10016523    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

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Mary Rebecca Janowitz among 443 lactation consultant (registered nurse) records in California

Mary Rebecca Janowitz, R.N., IBCLC is one of 443 lactation consultant (registered nurse) records with a practice address in California. under 1% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2007, is newer than under 1% of them.

  • NPI issued2007 · under 1% of these records are older, 92% newer
  • In a Medicare fileNo · under 1% of these records are
  • In the CMS Doctors and Clinicians fileNo · 0% of these records are
  • Record last updated2007 · 46% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 163WL0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Lactation Consultant (Registered Nurse) providers in California

There are 443 lactation consultant (registered nurse) records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 443 in California → Every provider in San Francisco → Lactation Consultant (Registered Nurse) nationwide →

The 8 lactation consultant (registered nurse) records with the nearest ZIP codes

  1. Estelle Fraisse, RN, IBCLCSan Francisco, CA 941101619622321
  2. Michele Healow, RN, IBCLCSan Francisco, CA 941121376306704
  3. Jennifer Maeder, RN, IBCLCSan Francisco, CA 941141699240002
  4. Laura Johnson, RN, IBCLCSan Francisco, CA 941151134900426
  5. Micaela MaguireSan Francisco, CA 941161558028910
  6. Elisabeth Roberts, RN, IBCLCSan Francisco, CA 941171003547381
  7. Heather Fraser, R.N., IBCLCSan Francisco, CA 941181629362090
  8. Joy Taylor, RN, IBCLCSan Francisco, CA 941181831039759

Common questions

What is Mary Rebecca Janowitz, R.N., IBCLC's NPI number?

Mary Rebecca Janowitz, R.N., IBCLC's National Provider Identifier (NPI) is 1386850147, issued on May 15, 2007. An NPI identifies a provider in billing; it is not a license.

Where is Mary Rebecca Janowitz, R.N., IBCLC located?

The NPPES record lists a practice address at 3555 Cesar Chavez, San Francisco, CA, 94110. Phone: (415) 641-6869. Providers update this record themselves, so call before visiting.

How can I verify Mary Rebecca Janowitz, R.N., IBCLC's license?

NPPES lists California license number 10016523, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.