Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARY ELIZABETH JOHNSON MD
NPI 1902887227
Emergency Medicine in San Francisco, CA

Q: What is Mary Johnson's NPI number?

The NPI number for Mary Johnson is 1902887227. It was assigned to this individual provider in the NPPES registry on November 14, 2005.

Q: What is Mary Johnson's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Q: When was this NPI record last updated?

The NPPES record for Mary Johnson was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 39 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since November 14, 2005PECOS EnrolledAccepts Medicare Assignment

2333 BUCHANAN ST, SAN FRANCISCO, CA 94115(209) 342-2300(209) 524-4240 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Mary Elizabeth Johnson Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARY ELIZABETH JOHNSON MD (NPI 1902887227) is an individual emergency medicine provider in San Francisco, California, licensed in California (A75167) and active in the NPI registry since November 2005. She is enrolled in Medicare PECOS and is a graduate of University Of Oklahoma College Of Medicine (1999).

NPPES Registry Identity

NPI1902887227

Entity TypeIndividualFemale

Primary Taxonomy207P00000X

Provider Legal NameMARY ELIZABETH JOHNSONCredential: MD

Location Address2333 BUCHANAN STSan Francisco, CA 94115-1925

Mailing AddressPo Box 232410San Diego, CA 92193-2410 · (209) 342-2300 · Fax (209) 524-4240

Phone(209) 342-2300

Fax(209) 524-4240

Sole ProprietorNo

Medical School CMSUniversity Of Oklahoma College Of MedicineGraduated 1999

Enumeration DateNovember 14, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1902887227 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

License✔ Licensed in CA · A75167

Definition

An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.

2333 BUCHANAN ST, San Francisco, CA 94115

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Other Identifiers 2

Medicaid00A751670CA

Other00A751670CA · Blue Shield

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mary Elizabeth Johnson Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9436140951

PECOS Enrollment IDI20040521001017

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 17

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

158 services155 patients

Routine electrocardiogram (ecg) using at least 12 leads with tracing 93005

An Electrocardiogram (ECG) is a simple, painless test that records the heart's electrical activity. Using 12 leads attached to your skin, it generates a tracing of your heart rhythm. It helps detect any heart problems by showing the timing and strength of electrical signals passing through each part of your heart.

146 services134 patients

Injection, ondansetron hydrochloride, per 1 mg J2405

Ondansetron hydrochloride is a medication given via injection to help prevent nausea and vomiting, often due to chemotherapy or surgery. It works by blocking certain chemicals in the body that trigger these symptoms.

138 services32 patients

Injection, ceftriaxone sodium, per 250 mg J0696

Ceftriaxone sodium is an antibiotic injection used to treat a variety of bacterial infections. Each injection contains 250 mg of the medicine. It works by stopping the growth of bacteria in your body.

112 services25 patients

Injection of drug or substance into vein 96374

This procedure involves introducing a medication or substance directly into your vein using a syringe. It's a quick and efficient way to deliver treatment throughout your body. You might feel a small prick when the needle enters. It's generally safe and effective.

62 services62 patients

Automated urinalysis test 81003

An automated urinalysis test is a routine examination that checks your urine for various substances. It can help identify potential health issues such as kidney problems or diabetes. The test uses a machine to analyze a small urine sample, providing quick and accurate results.

56 services55 patients

Injection of additional new drug or substance into vein 96375

This procedure involves introducing a new medication or substance into your bloodstream via a vein. It's typically done using a small needle. The substance can help treat various conditions or assist in diagnostic procedures. It's generally safe and monitored by professionals.

53 services38 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

53 services52 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

52 services51 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

45 services45 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

38 services38 patients

Infusion into a vein for hydration, each additional hour 96361

This procedure involves delivering fluids directly into your vein to keep your body hydrated. It is typically done when oral hydration is insufficient. Each additional hour means more fluid is infused to ensure adequate hydration.

32 services25 patients

Infusion, normal saline solution , 1000 cc J7030

An infusion of normal saline solution, 1000 cc, is a common medical procedure. It involves introducing a saltwater solution into your bloodstream via an intravenous (IV) line. This helps to hydrate your body, correct electrolyte imbalances, and deliver medications if needed.

28 services28 patients

Infusion into a vein for therapy, prevention, or diagnosis, 1 hour or less 96365

This is a procedure where a medical professional inserts a small tube into your vein to deliver medication, nutrients, or fluids directly into your bloodstream. This can be for treatment, prevention, or diagnosis. The process typically takes less than an hour.

21 services21 patients

Infusion into a vein for hydration, 31-60 minutes 96360

This is a procedure where a sterile solution is administered into your vein to help restore body fluid balance. It typically lasts between 31-60 minutes. It's a safe, common treatment for dehydration or to deliver medication.

19 services19 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

16 services16 patients

Inhalation treatment for airway obstruction or sputum production 94640

Inhalation treatment, also known as nebulizer therapy, helps clear airway obstructions and reduce sputum production. It involves breathing in medication through a device, turning it into a mist. This can open up the airways, making breathing easier and helping to cough out mucus.

13 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94115 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$104.51 typical visit price

range $69.00 – $202.35

Typical copayment $26.12 (range $17.25 – $50.58)

Most-billed visit code 99203

Established Patient

$119.48 typical visit price

range $23.44 – $166.46

Typical copayment $29.87 (range $5.86 – $41.61)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

TIMOTHY BAUER DUNCAN MD

Emergency Medicine

2333 BUCHANAN ST
SAN FRANCISCO, CA 94115

San Francisco County (209) 342-2300

DR. SHERRY PINWATANA LIAO PHARM.D.

Pharmacist

2333 BUCHANAN ST
SAN FRANCISCO, CA 94115

San Francisco County (415) 600-6000

CPMC

General Acute Care Hospital

2333 BUCHANAN ST
SAN FRANCISCO, CA 94115

San Francisco County (415) 600-6000

ROBERT MCGARRIGLE

Internal Medicine

2333 BUCHANAN ST
SAN FRANCISCO, CA 94115

San Francisco County (415) 350-9356

MS. JULIA LEWIS-HATHEWAY

Student in an Organized Health Care Education/Training Program

2333 BUCHANAN ST
SAN FRANCISCO, CA 94115

San Francisco County (415) 600-6000

DR. RYAN DONG P.T.

Physical Therapist

2333 BUCHANAN ST, 4880
SAN FRANCISCO, CA 94115

San Francisco County (415) 600-3399

PHILLIP KENNEDY M.D.

Internal Medicine

2333 BUCHANAN ST
SAN FRANCISCO, CA 94115

San Francisco County (925) 634-9704

KENNETH F. BINMOELLER, MD INC

Internal Medicine (Gastroenterology)

2333 BUCHANAN ST, 5TH FLOOR GI LAB
SAN FRANCISCO, CA 94115

San Francisco County (415) 600-1151

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mary Johnson's NPI number?

The NPI number for Mary Johnson is 1902887227. It was assigned to this individual provider in the NPPES registry on November 14, 2005.

Where is Mary Johnson located?

Mary Johnson practices at 2333 Buchanan St, San Francisco, CA 94115. The listed phone number is (209) 342-2300.

What is Mary Johnson's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Mary Johnson enrolled in Medicare?

Yes. Mary Johnson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Mary Johnson was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 39 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.