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MS. EMILY LYDON MD
NPI 1548720733
Internal Medicine - Infectious Disease in San Francisco, CA

Active since March 22, 2019PECOS EnrolledAccepts Medicare Assignment
513 PARNASSUS AVE RM S380, SAN FRANCISCO, CA 94143(415) 476-1000 Get Directions Write a Review

NPPES record last updated: March 19, 2026. Verified against the NPPES registry weekly; last sync: September 13, 2026.

Record update history: Mar 19, 2026, Mar 22, 2019 (2 updates tracked since 2019).

About Ms. Emily Lydon Md NPPES

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

MS. EMILY LYDON MD (NPI 1548720733) is an individual infectious disease provider in San Francisco, California, licensed in California (A178381) and active in the NPI registry since March 2019. She is enrolled in Medicare PECOS and is a graduate of Duke University School Of Medicine (2019).

NPPES Registry Identity

NPI1548720733
Entity TypeIndividualFemale
Primary Taxonomy207RI0200X
Provider Legal NameMS. EMILY LYDONCredential: MD
Location Address513 PARNASSUS AVE RM S380San Francisco, CA 94143-2205
Mailing Address513 Parnassus Ave Rm S380San Francisco, CA 94143-2205 · (781) 264-6904
Phone(415) 476-1000
Sole ProprietorNo
Medical School CMSDuke University School Of MedicineGraduated 2019
Enumeration DateMarch 22, 2019
Last NPPES UpdateMarch 19, 20262 updates tracked since enumeration
NPPES CertifiedMarch 19, 2026
✔ NPI 1548720733 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
License✔ Licensed in CA · A178381
Definition
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
513 PARNASSUS AVE RM S380, San Francisco, CA 94143
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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

Ms. Emily Lydon 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 ID648670620
PECOS Enrollment IDI20240717001533
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

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
31 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94143 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
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
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.

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 Emily Lydon's NPI number?

The NPI number for Emily Lydon is 1548720733. It was assigned to this individual provider in the NPPES registry on March 22, 2019.

Where is Emily Lydon located?

Emily Lydon practices at 513 Parnassus Ave Rm S380, San Francisco, CA 94143. The listed phone number is (415) 476-1000.

What is Emily Lydon's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Emily Lydon enrolled in Medicare?

Yes. Emily Lydon 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 Emily Lydon was last updated on March 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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.