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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. JOHN CARTER ALDEN MD
NPI 1013986868
Ophthalmology in Oakland, CA

Active since March 15, 2006PECOS Enrolled
350 30TH STREET, SUITE 444, OAKLAND, CA 94609(510) 452-2020(510) 452-2091 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. John Carter Alden Md NPPES

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

DR. JOHN CARTER ALDEN MD (NPI 1013986868) is an individual ophthalmology provider in Oakland, California, licensed in California (000G84240) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1013986868
Entity TypeIndividualMale
Primary Taxonomy207W00000X
Provider Legal NameDR. JOHN CARTER ALDENCredential: MD
Location Address350 30TH STREET, SUITE 444Oakland, CA 94609
Mailing Address350 30th Street, Suite 444Oakland, CA 94609 · (510) 452-2020 · Fax (510) 452-2091
Phone(510) 452-2020
Fax(510) 452-2091
Sole ProprietorNo
Enumeration DateMarch 15, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1013986868 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians
Taxonomy Code207W00000X
License✔ Licensed in CA · 000G84240
Definition
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
350 30TH STREET, Oakland, CA 94609
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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 (PECOS)

Dr. John Carter Alden Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94609 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
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
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 6

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

ADAM H MARVIN M.D.
Otolaryngology (Plastic Surgery within the Head & Neck)
350 30TH STREET, SUITE 444
OAKLAND, CA 94609
Alameda County (510) 452-9213
KATHI LAMPKIN NP
Nurse Practitioner
350 30TH STREET, SUITE 407
OAKLAND, CA 94609
Alameda County (510) 419-0276
D LOUIS M D A MEDICAL CORPORATION
Family Medicine
350 30TH STREET, SUITE 540
OAKLAND, CA 94609
Alameda County (510) 836-0223
DR. DAVID LOUIS M.D.
Family Medicine
350 30TH STREET, SUITE 540
OAKLAND, CA 94609
Alameda County (510) 836-0223
DR. NAYVIN GORDON MD
Family Medicine
350 30TH STREET, SUITE #405 DR N GORDON
OAKLAND, CA 94609
Alameda County (510) 444-1319
DR. SAMUEL DONG MD
Internal Medicine
350 30TH STREET, SUITE 407
OAKLAND, CA 94609
Alameda County (510) 419-0230

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 John Alden's NPI number?

The NPI number for John Alden is 1013986868. It was assigned to this individual provider in the NPPES registry on March 15, 2006.

Where is John Alden located?

John Alden practices at 350 30th Street Suite 444, Oakland, CA 94609. The listed phone number is (510) 452-2020.

What is John Alden's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

Is John Alden enrolled in Medicare?

Yes. John Alden is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for John Alden 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 22 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.