Arleen Guerrero Nieva, M.D., Inc.
NPI 1568767986 · Internal Medicine Physician · Long Beach, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Arleen Guerrero Nieva, M.D., Inc. is a Internal Medicine Physician organization in Long Beach, CA (NPI 1568767986).
Provider details
- NPI number
- 1568767986
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Shalom Nieva, Office Manager(562) 595-9835
- License
- A68932 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
15 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-01-14
- Last updated
- 2011-01-14
Frequently asked questions
- What is Arleen Guerrero Nieva, M.D., Inc.'s NPI number?
- Arleen Guerrero Nieva, M.D., Inc.'s National Provider Identifier (NPI) is 1568767986, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Arleen Guerrero Nieva, M.D., Inc.?
- Arleen Guerrero Nieva, M.D., Inc. is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Arleen Guerrero Nieva, M.D., Inc. located?
- Arleen Guerrero Nieva, M.D., Inc.'s practice location on file with NPPES is 330 W Willow St, Long Beach, CA 90806-2802.
- What is Arleen Guerrero Nieva, M.D., Inc.'s phone number?
- The practice phone number listed in the NPPES registry for Arleen Guerrero Nieva, M.D., Inc. is (562) 595-9835.
- Does Arleen Guerrero Nieva, M.D., Inc. accept Medicare?
- Arleen Guerrero Nieva, M.D., Inc. is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Arleen Guerrero Nieva, M.D., Inc.?
- The authorized official listed on Arleen Guerrero Nieva, M.D., Inc.'s NPPES record is Shalom Nieva, Office Manager. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Arleen Guerrero Nieva, M.D., Inc.'s NPI active?
- Yes — Arleen Guerrero Nieva, M.D., Inc.'s NPI (1568767986) is active in the NPPES registry as of the last update on 2011-01-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.