DR. STEPHANIE JACQUELYN MARONEY M.D.
NPI 1003106436
Surgery in Larkspur, CA

Q: What is Stephanie Maroney's NPI number?

The NPI number for Stephanie Maroney is 1003106436. It was assigned to this individual provider in the NPPES registry on April 19, 2011. The provider is also known as Stephanie Humber.

Q: What is Stephanie Maroney's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Q: When was this NPI record last updated?

The NPPES record for Stephanie Maroney was last updated on March 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.

Active since April 19, 2011PECOS Enrolled

5 BON AIR RD STE 101, LARKSPUR, CA 94939(415) 924-2515(415) 924-2661 Get Directions Write a Review

NPPES record last updated: March 4, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Mar 4, 2026, Dec 1, 2021 (2 updates tracked since 2021).

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About Dr. Stephanie Jacquelyn Maroney M.d. NPPES

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

DR. STEPHANIE JACQUELYN MARONEY M.D. (NPI 1003106436) is an individual surgery provider in Larkspur, California, licensed in California (A122712) and active in the NPI registry since April 2011. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2011).

NPPES Registry Identity

NPI1003106436

Entity TypeIndividualFemale

Primary Taxonomy208600000X

Provider Legal NameDR. STEPHANIE JACQUELYN MARONEYCredential: M.D.

Location Address5 BON AIR RD STE 101Larkspur, CA 94939-1134

Mailing Address5 Bon Air Rd Ste 101Larkspur, CA 94939-1134 · (415) 924-2515 · Fax (415) 924-2661

Phone(415) 924-2515

Fax(415) 924-2661

Sole ProprietorNo

Medical School CMSOtherGraduated 2011

Enumeration DateApril 19, 2011

Last NPPES UpdateMarch 4, 20262 updates tracked since enumeration

NPPES CertifiedMarch 4, 2026

✔ NPI 1003106436 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208600000X

Licenses✔ Licensed in CA · A122712✔ Licensed in MA · 281722

Definition

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

5 BON AIR RD STE 101, Larkspur, CA 94939

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Other Names 1

Former Name (1)Stephanie Humber

Secondary Practice Locations 2

Location 1250 Bon Air RdGreenbrae, CA 94904-1702 · Phone (415) 924-2515 · Fax (415) 924-2661

Location 275 Rowland Way # 230Novato, CA 94945-5037 · Phone (415) 924-2515 · Fax (415) 924-2661

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Stephanie Jacquelyn Maroney M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID1759671886

PECOS Enrollment IDI20160602000710

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.

Medicare Billing Reassignment

Medicare enrollment records show Stephanie Maroney reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Regents Univ Of California Ucsf

13 mi

Internal Medicine

505 PARNASSUS AVE
San Francisco, CA 94143

Reassigned Medicare billing, California enrollment
339 clinicians in this Medicare group

NPI 1124439807 (415) 476-1000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 5

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 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

96 services48 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.

42 services42 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

38 services38 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

26 services25 patients

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.

20 services18 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94939 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

$104.67 typical visit price

range $69.07 – $202.63

Typical copayment $26.16 (range $17.26 – $50.65)

Most-billed visit code 99203

Established Patient

$85.00 typical visit price

range $23.44 – $166.64

Typical copayment $21.25 (range $5.86 – $41.66)

Most-billed visit code 99213

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 4

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

JOSHUA ALEX WECHSLER MD

Surgery (Trauma Surgery)

5 BON AIR RD STE 101
LARKSPUR, CA 94939

Marin County (415) 924-2515

SEAN KEVIN MARONEY M.D.

Surgery

5 BON AIR RD STE 101
LARKSPUR, CA 94939

Marin County (415) 924-2515

LISA PARK

Colon & Rectal Surgery

5 BON AIR RD STE 101
LARKSPUR, CA 94939

Marin County (415) 924-2515

DR. EDWARD JOHN ALFREY M.D.

Transplant Surgery

5 BON AIR RD STE 101
LARKSPUR, CA 94939

Marin County (415) 924-2515

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 Stephanie Maroney's NPI number?

The NPI number for Stephanie Maroney is 1003106436. It was assigned to this individual provider in the NPPES registry on April 19, 2011. The provider is also known as Stephanie Humber.

Where is Stephanie Maroney located?

Stephanie Maroney practices at 5 Bon Air Rd Ste 101, Larkspur, CA 94939. The listed phone number is (415) 924-2515.

What is Stephanie Maroney's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Stephanie Maroney enrolled in Medicare?

Yes. Stephanie Maroney is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Stephanie Maroney's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Stephanie Maroney reassigns Medicare benefits to Regents Univ Of California Ucsf (San Francisco, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Stephanie Maroney's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Stephanie Maroney was last updated on March 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.