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DR. RAMON ARENAS GUADIZ M.D.
NPI 1003998147
Internal Medicine - Nephrology in Lynwood, CA

Active since October 19, 2006PECOS EnrolledAccepts Medicare Assignment
3625 MARTIN LUTHER KING JR BLVD, SUITE 2, LYNWOOD, CA 90262(310) 638-0533(310) 638-9171 Get Directions Write a Review

NPPES record last updated: December 20, 2012. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Ramon Arenas Guadiz M.d. NPPES

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

DR. RAMON ARENAS GUADIZ M.D. (NPI 1003998147) is an individual nephrology provider in Lynwood, California, licensed in California (A72478) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1987).

NPPES Registry Identity

NPI1003998147
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameDR. RAMON ARENAS GUADIZCredential: M.D.
Location Address3625 MARTIN LUTHER KING JR BLVD, SUITE 2Lynwood, CA 90262-3509
Mailing Address3625 Martin Luther King Jr Blvd, Suite 2Lynwood, CA 90262-3509 · (310) 638-0533 · Fax (310) 638-9171
Phone(310) 638-0533
Fax(310) 638-9171
Sole ProprietorNo
Medical School CMSOtherGraduated 1987
Enumeration DateOctober 19, 2006
Last NPPES UpdateDecember 20, 2012
✔ NPI 1003998147 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
License✔ Licensed in CA · A72478
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
3625 MARTIN LUTHER KING JR BLVD, Lynwood, CA 90262
Open in Google Maps ↗

Other Identifiers 1

Other1609098003CA · Renal Medical Associates Npi Number

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Ramon Arenas Guadiz M.d. 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 ID1153319553
PECOS Enrollment IDI20050414000794
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 Reassignments

2

Medicare enrollment records show Ramon Guadiz reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Renal Medical Associates
Same address
Nephrology
3625 E MARTIN LUTHER KING JR BLVD #2
Lynwood, CA 90262
  • Reassigned Medicare billing, California enrollment
  • 3 clinicians in this Medicare group
NPI 1609098003 (310) 638-0533
County Of Los Angeles
2.5 mi
Clinic/Center
1670 E 120TH ST
Los Angeles, CA 90059
  • Reassigned Medicare billing, California enrollment
  • 435 clinicians in this Medicare group
NPI 1780877613 (310) 668-5201

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 9

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.

Dialysis services, 4 or more physician visits per month (20 years or older) 90960
Dialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can't do their job. This service includes 4 or more visits per month with a physician to monitor your health and adjust your treatment as needed.
157 services39 patients
Dialysis services, 2-3 physician visits per month (20 years or older) 90961
Dialysis is a treatment that performs the function of healthy kidneys if they're not working properly. It removes waste and excess fluid from your blood. 2-3 physician visits per month are recommended for monitoring your health and adjusting your treatment as needed. This service is available for those aged 20 years and older.
128 services35 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.
119 services47 patients
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231
Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
64 services35 patients
Hemodialysis procedure with physician evaluation 90935
Hemodialysis is a treatment that uses a machine to filter waste and excess fluid from your blood when your kidneys can't. A physician checks your health before, during, and after the procedure to ensure it's working effectively for you.
62 services26 patients
Dialysis services, 1 physician visit per month (20 years or older) 90962
Dialysis is a treatment that filters and purifies your blood using a machine. It helps keep your fluids and electrolytes in balance when the kidneys can’t do their job. A physician visit once a month ensures your treatment is working effectively and adjusts it if necessary. This service is available for individuals aged 20 years and older.
45 services22 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90262 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
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 12

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

MR. THINH DINH HOANG RPH
Pharmacist
3625 MARTIN LUTHER KING JR BLVD, STE # 1
LYNWOOD, CA 90262
Los Angeles County (424) 406-2066
DR. SATYA N. KACHGAL D.D.S.
Dentist
3625 MARTIN LUTHER KING JR BLVD, STE. 8
LYNWOOD, CA 90262
Los Angeles County (310) 603-1371
DR. MALVIN YAN INC.
Clinic/Center
3625 MARTIN LUTHER KING JR BLVD, SUITE 4
LYNWOOD, CA 90262
Los Angeles County (310) 886-0869
STEPHEN LUI MD INC
Internal Medicine (Nephrology)
3625 MARTIN LUTHER KING JR BLVD, SUITE 5
LYNWOOD, CA 90262
Los Angeles County (310) 763-7504
ANDY HONG MD
Internal Medicine (Nephrology)
3625 MARTIN LUTHER KING JR BLVD, SUITE #5
LYNWOOD, CA 90262
Los Angeles County (310) 763-7504
BRIAN M LEE MD
Internal Medicine (Nephrology)
3625 MARTIN LUTHER KING JR BLVD, SUITE #5
LYNWOOD, CA 90262
Los Angeles County (310) 763-7504
SUCHEERA WONGRAVEEKUL NP
Nurse Practitioner
3625 MARTIN LUTHER KING JR BLVD, SUITE 4
LYNWOOD, CA 90262
Los Angeles County (310) 886-0869
RODRIGO J ROCHA M.D.
Internal Medicine (Nephrology)
3625 MARTIN LUTHER KING JR BLVD, SUITE #2
LYNWOOD, CA 90262
Los Angeles County (310) 638-0533

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 Ramon Guadiz's NPI number?

The NPI number for Ramon Guadiz is 1003998147. It was assigned to this individual provider in the NPPES registry on October 19, 2006.

Where is Ramon Guadiz located?

Ramon Guadiz practices at 3625 Martin Luther King Jr Blvd Suite 2, Lynwood, CA 90262. The listed phone number is (310) 638-0533.

What is Ramon Guadiz's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Ramon Guadiz enrolled in Medicare?

Yes. Ramon Guadiz 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.

Which organizations bill Medicare for Ramon Guadiz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ramon Guadiz reassigns Medicare benefits to 2 organizations: Renal Medical Associates (Lynwood, CA) and County Of Los Angeles (Los Angeles, CA). Each 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 Ramon Guadiz'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 Ramon Guadiz was last updated on December 20, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years 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.